Healthcare Cost and Utilization Project (HCUPnet)

National Inpatient -- All Stays 

The NIS is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The NIS is the largest publicly available all-payer inpatient healthcare database designed to produce U.S. regional and national estimates of inpatient utilization, access, costs, quality, and outcomes. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the NIS database documentation for more information.  

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

National Inpatient Sample (NIS) Redesign: Beginning with the 2012 data, the National Inpatient Sample (NIS) was redesigned to optimize national estimates. The nationwide statistics in HCUPnet for years prior to 2012 were regenerated using new trend weights in order to permit longitudinal analysis. The regenerated data were posted to HCUPnet on 7/2/2014. The statistics for years prior to 2012 currently on HCUPnet will differ slightly from statistics obtained prior to 7/2/2014. For more information about the NIS redesign and trend weights, please view the Overview of the NIS. If you want to use the previous versions of the NIS weights, click here.

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

National Inpatient -- Diagnoses and Procedures 

The NIS is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The NIS is the largest publicly available all-payer inpatient healthcare database designed to produce U.S. regional and national estimates of inpatient utilization, access, costs, quality, and outcomes. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the NIS database documentation for more information. 

Please note, HCUPnet no longer offers the option to query individual ICD-9-CM or ICD-10-CM/PCS codes. Instead, annual counts of discharges for each individual ICD-9-CM and ICD-10-CM/PCS code in the NIS are available in the 'Data Elements' section of the NIS documentation page on HCUP-US. For analyses performed at the level of individual ICD-9-CM or ICD-10-CM/PCS codes, please purchase HCUP data through the Central Distributor.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Calculation of Rates: Rates were calculated using the first three quarters of ICD-9-CM/PCS data for 2015 in the numerator and three-fourths of the national population for 2015 in the denominator

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

State Inpatient -- All Stays 

The SID are State-specific files that contain all inpatient care records in participating states. The SID includes inpatient discharge records from community hospitals in that State. The SID files encompass all patients, regardless of payer, providing a unique view of inpatient care in a defined market or State over time. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the SID documentation for database information.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

State Inpatient -- Diagnoses and Procedures 

The SID are State-specific files that contain all inpatient care records in participating states. The SID includes inpatient discharge records from community hospitals in that State. The SID files encompass all patients, regardless of payer, providing a unique view of inpatient care in a defined market or State over time. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the SID documentation for database information.

Please note, HCUPnet no longer offers the option to query individual ICD-9-CM or ICD-10-CM/PCS codes. Instead, annual counts of discharges for each individual ICD-9-CM and ICD-10-CM/PCS code in the NIS are available in the 'Data Elements' section of the NIS documentation page on HCUP-US. For analyses performed at the level of individual ICD-9-CM or ICD-10-CM/PCS codes, please purchase HCUP data through the Central Distributor.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

Children Only -- All Stays

The KID is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The KID is the largest publicly available all-payer pediatric inpatient care database in the United States, containing data from two to three million hospital stays designed to produce U.S. regional and national estimates of inpatient utilization, access, costs, quality, and outcomes. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the KID database documentation for more information. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

Children Only -- Diagnoses and Procedures

The KID is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The KID is the largest publicly available all-payer pediatric inpatient care database in the United States, containing data from two to three million hospital stays designed to produce U.S. regional and national estimates of inpatient utilization, access, costs, quality, and outcomes. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the KID database documentation for more information. 

Please note, HCUPnet no longer offers the option to query individual ICD-9-CM or ICD-10-CM/PCS codes. Instead, annual counts of discharges for each individual ICD-9-CM and ICD-10-CM/PCS code in the KID are available in the 'Data Elements' section of the KID documentation page on HCUP-US. For analyses performed at the level of individual ICD-9-CM or ICD-10-CM/PCS codes, please purchase HCUP data through the Central Distributor.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

National Emergency Department -- All ED Visits 

The NEDS describes ED visits, regardless of whether they result in admission. One of the most distinctive features of the NEDS is its large sample size, which allows for analysis across hospital types and the study of relatively uncommon disorders and procedures. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the NEDS database documentation for database information. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

National Emergency Department -- Diagnoses 

The NEDS describes ED visits, regardless of whether they result in admission. One of the most distinctive features of the NEDS is its large sample size, which allows for analysis across hospital types and the study of relatively uncommon disorders and procedures. These databases are created by AHRQ through a Federal-State-Industry partnership. Refer to the NEDS database documentation for database information. 

Please note, HCUPnet no longer offers the option to query individual ICD-9-CM or ICD-10-CM codes. Instead, annual counts of discharges for each individual ICD-9-CM and ICD-10-CM code in the NEDS are available in the 'Data Elements' section of the NEDS documentation page on HCUP-US. For analyses performed at the level of individual ICD-9-CM or ICD-10-CM codes, please purchase HCUP data through the Central Distributor.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

ICD codes comprising CCS Categories: See the ICD codes that comprise CCS categories

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

State Emergency Department -- All ED Visits 

This dashboard describes State-specific ED visits, and includes ED visits that result in admission. These data are created by AHRQ through a Federal-State-Industry partnership. Refer to SEDD database documentation for database information. Information on patients seen in the emergency room and then admitted to the hospital is included in the State Inpatient Databases (SID).

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS_². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

State Emergency Department -- Diagnoses 

This dashboard describes State-specific ED visits and includes ED visits that result in admission. These data are created by AHRQ through a Federal-State-Industry partnership. Refer to SEDD database documentation for database information. 

Please note, HCUPnet no longer offers the option to query individual ICD-9-CM or ICD-10-CM codes. Instead, annual counts of discharges for each individual ICD-9-CM and ICD-10-CM code in the NEDS are available in the 'Data Elements' section of the NEDS documentation page on HCUP-US. For analyses performed at the level of individual ICD-9-CM or ICD-10-CM codes, please purchase HCUP data through the Central Distributor. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Clinical Coding: On October 1, 2015, the United States transitioned from ICD-9-CM¹ to ICD-10-CM/PCS². The 2015 data in HCUPnet include three quarters of information based on ICD-9-CM coding, whereas the fourth quarter is based on ICD-10-CM/PCS coding. Users may observe discontinuity in trends analyses that span the October 1, 2015 transition date.

Notable increases or decreases may be observed in the statistics across the ICD-9-CM to ICD-10-CM/PCS transition that are more reflective of definitional changes rather than changes in hospital utilization. Compared with the ICD-9-CM time period, some definitions of hospitalization type for ICD-10-CM/PCS may be more narrowly or more broadly defined. More information on the impact of ICD-10-CM/PCS is available on the HCUP User Support (HCUP-US) web page for ICD-10-CM/PCS Resources.

1 International Classification of Diseases, Ninth Revision, Clinical Modification

2 International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System

Please visit the Clinical Classification Software Refined (CCSR) for ICD-10-CM/PCS and the Clinical Classification Software (CCS) for ICD-9-CM  for more information on category definitions.

Notes:

Cost and charge information is not adjusted for inflation.

Percentages may not total to 100 due to rounding or missing information.

National Inpatient Readmissions -- All Stays

The Nationwide Readmissions Database (NRD) is a set of inpatient databases in the HCUP family designed for readmission analyses.

The NRD is a unique and powerful database designed to support various types of analyses of national readmission rates for all patients, regardless of the expected payer for the hospital stay. Refer to the NRD database documentation for more information. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Index stays are identified in January to November to allow for a 7-day or 30-day readmission window for all index stays (e.g., a November index stay with readmissions in December). Based on hospital inpatient discharges from January through November, thus the number of readmissions does not constitute an annual figure. Index stays require "live" discharge status and non-missing length of stay. Index stays do not require a prior "clean period" with no hospitalizations; that is, a hospital stay may be both a readmission for a prior stay and an index stay for a subsequent readmission. 

Transfers (discharge date is the same date as a subsequent admission date) are treated as single index stays.

Readmissions may be defined with inclusion criteria (e.g., same diagnosis upon readmission); however, the definition of readmissions does not use risk adjustment or diagnostic exclusions (e.g., cancer, trauma, maternal, neonatal, planned readmissions). Readmissions can occur at any hospital within a given state in the database; readmissions that cross state boundaries will not be counted.

Excludes patients younger than one year of age (because patient identifiers are inconsistently reported for these patients).
See "Methods - Calculating Readmissions for HCUPnet"  HTML.

Weighted estimates from the Healthcare Cost and Utilization Project (HCUP) Nationwide Readmissions Database for the Year selected,  Agency for Healthcare Research and Quality (AHRQ), based on data collected by individual States and provided to AHRQ by the States.

Notes: Cost and charge information is not adjusted for inflation.

National Inpatient Readmissions -- Diagnoses and Procedures 

The Nationwide Readmissions Database (NRD) is a set of inpatient databases in the HCUP family designed for readmission analyses.

The NRD is a unique and powerful database designed to support various types of analyses of national readmission rates for all patients, regardless of the expected payer for the hospital stay. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

Index stays are identified in January to November to allow for a 7-day or 30-day readmission window for all index stays (e.g., a November index stay with readmissions in December). Based on hospital inpatient discharges from January through November, thus the number of readmissions does not constitute an annual figure. Index stays require "live" discharge status and non-missing length of stay. Index stays do not require a prior "clean period" with no hospitalizations; that is, a hospital stay may be both a readmission for a prior stay and an index stay for a subsequent readmission. 

Transfers (discharge date is the same date as a subsequent admission date) are treated as single index stays.

Readmissions may be defined with inclusion criteria (e.g., same diagnosis upon readmission); however, the definition of readmissions does not use risk adjustment or diagnostic exclusions (e.g., cancer, trauma, maternal, neonatal, planned readmissions). Readmissions can occur at any hospital within a given state in the database; readmissions that cross state boundaries will not be counted.

Excludes patients younger than one year of age (because patient identifiers are inconsistently reported for these patients).
See "Methods - Calculating Readmissions for HCUPnet"  HTML.

Weighted estimates from the Healthcare Cost and Utilization Project (HCUP) Nationwide Readmissions Database for the Year selected,  Agency for Healthcare Research and Quality (AHRQ), based on data collected by individual States and provided to AHRQ by the States.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level -- All Stays 

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF.  

Querying a single year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppression than region queries, because a region generally comprises multiple counties. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays, Quality Indicators

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. See also AHRQ Quality Indicators.

Querying a single data year will produce small cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppression than region queries, because region generally comprises multiple counties. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://hcupnet.ahrq.gov/. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Community-level PDIs: Computed using the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP) for the selected Year(s) State Inpatient Databases (SID). To maintain consistency with the PDIs computed for the National Healthcare Quality and Disparities Report, weighted national estimates are from an analysis file derived from the SID for the selected Year(s). This file provides national estimates using weighted records from a sample of hospitals from 44 States using the same methodology employed for the 2011 Nationwide Inpatient Sample.

Community-level PQIs: Computed using the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP) for the selected Year(s) State Inpatient Databases (SID). To maintain consistency with the PQIs computed for the National Healthcare Quality and Disparities Report, weighted national estimates are from an analysis file derived from the SID for the selected Year(s). This file provides national estimates using weighted records from a sample of hospitals from 44 States using the same methodology employed for the 2011 Nationwide Inpatient Sample.

Composite PQIs:

• PDI 90 - The overall pediatric quality indicator composite is based on the four AHRQ PDIs for asthma, diabetes short-term complications, gastroenteritis, and urinary tract infection.
• PDI 91 - The acute pediatric quality indicator composite is based on the two AHRQ PDIs for gastroenteritis and urinary tract infection.
• PDI 92 - The chronic pediatric quality indicator composite is based on the two AHRQ PDIs for asthma and diabetes short-term complications.

Rates of Discharges: Are calculated using HCUP inpatient data as numerators and Claritas county population estimates as denominators, except for perforated appendix, which uses the number of appendicitis discharges as the denominator, and except for low birth weight, which uses the number of births as the denominator.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- lnpatient Stays by Clinical Classification Software Refined (CCSR) Diagnoses

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. See also Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. 

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce small cell sizes and more cell suppression than region queries, because a region generally comprises multiple counties. 

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays by Clinical Classification Software (CCS) Diagnoses 

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. See also Clinical Classification Software (CCS) for ICD-9-CM.

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppressions than region queries, because a region generally comprises multiple counties.  

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays by Medicare Severity - Diagnosis Related Groups   

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners.  Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. 

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppressions than region queries, because a region generally comprises multiple counties.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays by Major Diagnostic Categories

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State).  Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. 

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppressions than region queries, because a region generally comprises multiple counties.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays by Clinical Classification Software Refined (CCSR) Procedures 

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners.  Statistics are aggregated to the patient residence (county, substate region, and State). Clinical procedures are restricted to operating-room procedures. Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. See also Clinical Classifications Software Refined (CCSR) for ICD-10 CM Diagnoses. 

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppressions than region queries, because a region generally comprises multiple counties.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.

Community-Level Statistics -- Inpatient Stays by Clinical Classification Software (CCS) Procedures  

Community-Level Statistics (CLS) are from the Agency for Healthcare Research and Quality (AHRQ), Healthcare Cost and Utilization Project (HCUP), State Inpatient Databases (SID), based on data collected by individual States and provided to AHRQ by State Partners. Statistics are aggregated to the patient residence (county, substate region, and State). Clinical procedures are restricted to operating-room procedures. Weighted national estimates are from the HCUP National (Nationwide) Inpatient Sample (NIS). For more information, see "Calculating Community-Level Statistics for HCUPnet: Methods" PDF. See also Clinical Classifications Software (CCS) for ICD-9 CM.   

Querying a single data year will produce smaller cell sizes and generally more cell suppression than querying a three-year period. Similarly, county queries will produce smaller cell sizes and more cell suppressions than region queries, because a region generally comprises multiple counties.

Select the Download Data button for an accessible MS Excel version of the data visualization. The file size will depend on parameters selected.

Suggested Citation: HCUPnet, Healthcare Cost and Utilization Project. Agency for Healthcare Research and Quality, Rockville, MD. https://datatools.ahrq.gov/hcupnet. For more information about HCUP data see http://www.hcup-us.ahrq.gov/

2015 Methodology: Due to the transition from ICD-9-CM to ICD-10-CM in October 2015, 2015 statistics were calculated using only quarter 1-3 data, and the statistics available are limited. In addition, only rates of discharges are displayed and not the number of discharges.

Notes: Cost and charge information is not adjusted for inflation.