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  1. hcup-us.ahrq.gov/db/state/siddbdocumentation.jsp
    May 01, 2025 - State Inpatient Databases (SID) Database Documentation The State Inpatient Databases (SID) are State-specific files that contain all inpatient care records in participating states. Together, the SID encompass more than 95 percent of all U.S. hospital discharges. The uniform format of the SID …
  2. hcup-us.ahrq.gov/db/state/sedddbdocumentation.jsp
    April 01, 2025 - State Emergency Department Databases (SEDD) Database Documentation The State Emergency Department Databases (SEDD) are a set of longitudinal State-specific emergency department (ED) databases included in the HCUP family. The SEDD capture discharge information on all emergency departmen…
  3. hcup-us.ahrq.gov/db/state/sasddbdocumentation.jsp
    April 01, 2025 - State Ambulatory Surgery and Services Databases (SASD) Database Documentation The State Ambulatory Surgery and Services Databases (SASD) are State-specific files that include data for ambulatory surgery and other outpatient services from hospital-owned facilities. In addition, some States pro…
  4. hcup-us.ahrq.gov/db/nation/nrd/nrddbdocumentation.jsp
    April 01, 2025 - Nationwide Readmissions Database (NRD) Database Documentation The Nationwide Readmissions Database (NRD) is a unique and powerful database designed to support various types of analyses of national readmissions for all patients regardless of the expected payer for the hospital stay. The NRD includes di…
  5. hcup-us.ahrq.gov/db/nation/kid/kiddbdocumentation.jsp
    April 01, 2025 - Kids' Inpatient Database (KID) Database Documentation The Kids' Inpatient Database (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 each year. Its large sample size is ideal for developing national and …
  6. hcup-us.ahrq.gov/db/nation/nass/nassdbdocumentation.jsp
    June 01, 2025 - Nationwide Ambulatory Surgery Sample (NASS) Database Documentation The largest all-payer ambulatory surgery database in the United States, the Nationwide Ambulatory Surgery Sample (NASS) produces national estimates of major ambulatory surgery encounters in hospital-owned facilities. The NASS contains clinical and r…
  7. hcup-us.ahrq.gov/db/nation/nis/nisdbdocumentation.jsp
    May 01, 2025 - National (Nationwide) Inpatient Sample (NIS) Database Documentation The National (Nationwide) Inpatient Sample (NIS) is the largest publicly available all-payer inpatient care database in the United States, containing data on more than seven million hospital stays. Its large sample size is ideal for developing nati…
  8. hcup-us.ahrq.gov/db/nation/neds/nedsdbdocumentation.jsp
    May 01, 2025 - Nationwide Emergency Department Sample (NEDS) Database Documentation The Nationwide Emergency Department Sample (NEDS) produces national estimates about emergency department (ED) visits across the country. The NEDS describes ED visits, regardless of whether they result in admission. One of the most distinctive fea…
  9. hcup-us.ahrq.gov/db/nation/nis/nisarchive.jsp
    February 01, 2025 - PDF file, 9,230 KB) Description of Data Elements Descriptions can be viewed as a single document
  10. hcup-us.ahrq.gov/db/nation/neds/nedsarchive.jsp
    February 01, 2025 - NEDS Database Documentation Archive An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  11. hcup-us.ahrq.gov/db/nation/kid/kidarchive.jsp
    February 01, 2025 - KID Database Documentation Archive An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  12. hcup-us.ahrq.gov/db/nation/nass/nassarchive.jsp
    December 01, 2024 - NASS Database Documentation Archive An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  13. hcup-us.ahrq.gov/db/nation/nrd/nrdarchive.jsp
    December 01, 2024 - NRD Database Documentation Archive An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  14. hcup-us.ahrq.gov/db/nation/kid/corrections2019.jsp
    January 01, 2023 - KID Database Documentation - Corrections An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Upda…
  15. hcup-us.ahrq.gov/db/nation/nis/correct_2019and2020.jsp
    January 01, 2023 - NIS Database Documentation - Corrections An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Upda…
  16. hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/data_collection.jsp
    February 01, 2025 - This document carefully describes each data selection step and identifies potential difficulties and … Minnesota grantee) Coronary Procedures Study: An Outline for Labs ( PDF file, 575 KB; HTML ) Document … Minnesota grantee) Enhancing Hawaii Hospital Information Content: Data Acquisition ( HTML ) Document … (Developed by the Hawaii grantee) LOINC Overview and Instructions ( PDF file, 102 KB; HTML ) Document … The document includes a background description of LOINC, instructions for submission, frequently asked
  17. hcup-us.ahrq.gov/db/nation/neds/nedscorrections.jsp
    February 01, 2013 - In some cases, there is a downloadable document that either provides more information or provides a program
  18. hcup-us.ahrq.gov/db/nation/nis/corrections_2011.jsp
    January 01, 2011 - NIS Database Documentation - Corrections An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Upda…
  19. hcup-us.ahrq.gov/db/nation/kid/corrections2003.jsp
    May 01, 2008 - Corrections to the Kids' Inpatient Database (KID) - 2003 Please refer to the information below for corrections to the KID data set. Correction to 2003 KID Core File, KID_STRATUM In the 2003 KID Core File, KID_STRATUM values of 9999 (Freestanding Children’s Hospitals) were inadvertently saved as 9998. To cor…
  20. hcup-us.ahrq.gov/db/quality.pdf
    January 31, 2025 - HCUP (2/20/2025) i Quality Control Procedures Document … INTRODUCTION This document describes the procedures used to assess data quality and perform basic … HCUP (2/20/2025) 3 Quality Control Procedures Document … HCUP (2/20/2025) 4 Quality Control Procedures Document … HCUP (2/20/2025) 5 Quality Control Procedures Document

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