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  1. hcup-us.ahrq.gov/reports/methods/2004_6_appendix_D.pdf
    January 01, 2004 - State Ambulatory Surgery Databases (SASD), and not all States participate in HCUP. … Table 26e D-42 2/2/2005 Table 27: Injury Records Classified by Intent 2001 HCUP Ambulatory Surgery … Table 29 D-45 2/2/2005 2001 HCUP Ambulatory Surgery Records State Maximum Number of Diagnoses … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1. … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1.
  2. hcup-us.ahrq.gov/reports/factbooks.jsp
    June 01, 2021 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Community Hospitals, 2004 Ambulatory Surgery in U.S.
  3. hcup-us.ahrq.gov/tools_software.jsp
    July 01, 2025 - Software (CCS) for Services and Procedures Groups codes into over 240 clinical categories Surgery … Procedure Classes for ICD-9-CM Identifies major, minor, diagnostic and therapeutic procedures Surgery
  4. hcup-us.ahrq.gov/db/availability_public.jsp
    September 01, 2025 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Revised 9/29/25 State State Inpatient Databases State Ambulatory Surgery and Services Databases … Databases National (Nationwide) Inpatient Sample Kids' Inpatient Database Nationwide Ambulatory Surgery … , 16, 19, 22 2016-2022 2018-2022   State State Inpatient Databases State Ambulatory Surgery
  5. hcup-us.ahrq.gov/tech_assist/index_abc.jsp
    February 01, 2022 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Home Page Agency for Healthcare Research and Quality (AHRQ) AHRQualityIndicators™ Ambulatory Surgery … Data Ambulatory Surgery in U.S.
  6. hcup-us.ahrq.gov/db/vars/ncpt_notinscope/nassnote.jsp
    August 01, 2019 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery
  7. hcup-us.ahrq.gov/reports/infographics/flus-annual-impact.jsp
    May 01, 2020 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Annual Flu-Related Expenses, 2016-17 $840 for emergency room visits $312 for ambulatory surgery
  8. hcup-us.ahrq.gov/db/nation/nass/nassrefinements2018.jsp
    December 21, 2019 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Refinements   2018 NASS Refinements The 2018 NASS applied updated versions of the HCUP Surgery
  9. hcup-us.ahrq.gov/db/vars/s_disc_u/nassnote.jsp
    August 01, 2019 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … For the NASS, N_DISC_U contains the total number of major ambulatory surgery encounters in sampled hospital-owned
  10. hcup-us.ahrq.gov/db/nation/nass/nassknowndataissue_2021.jsp
    January 01, 2021 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … NASS DATABASE DOCUMENTATION – CORRECTIONS Corrections to the National Ambulatory Surgery … less than one percent (0.84 percent) of the records in the 2021 HCUP Nationwide Ambulatory Surgery
  11. hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompwi.jsp
    June 01, 2007 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … The Wisconsin Department of Health Services collects an outpatient file that includes ambulatory surgery … Identification of the type of service is based on a record type indicator: Ambulatory surgery (record … When an ED visit results in an inpatient discharge or an outpatient surgery, the facility can choose
  12. hcup-us.ahrq.gov/db/nation/nass/nassrefinements2019.jsp
    October 18, 2021 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … : The 2019 NASS is based on data selected from both the HCUP State Ambulatory Surgery
  13. hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompga.jsp
    December 01, 2016 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … Systems provides HCUP with an outpatient file that includes emergency department (ED) visit, ambulatory surgery … GHA uses a patient type indicator to distinguish between these types of records: Ambulatory surgery … (patient type A) Ambulatory surgery that originated in the ED (patient type AE) Emergency department
  14. hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompnv.jsp
    September 01, 2013 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … file to HCUP that includes encounter-level data for emergency department (ED) services, outpatient surgery … , ambulatory surgery, and other outpatient. … CHIA provides HCUP with separate emergency department (ED) and ambulatory surgery (AS) source files.
  15. 2012-03 (pdf file)

    hcup-us.ahrq.gov/reports/projections/2012-03.pdf
    January 01, 2012 - Income (Lowest Compared to Highest Quartile) .........................44 Hip Replacement Revision Surgery … • primary knee arthroplasty for osteoarthritis • knee replacement revision surgery • spinal fusion … Prevalence, health care expenditures, and orthopedic surgery workforce for musculoskeletal conditions … Hip replacement revision surgery involves replacing part or all of an artificial (prosthetic) hip … Knee replacement revision surgery involves replacing part or all of an artificial (prosthetic) knee
  16. hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompky.jsp
    August 01, 2012 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … on the record (i.e., revenue codes and/or CPT codes) is used to identify a record as ED, ambulatory surgery … Records in the outpatient file are marked by patient type: "OS" for outpatient surgery visit "OC … SEDD records with evidence of other types of outpatient service, such as outpatient surgery can be identified
  17. hcup-us.ahrq.gov/reports/methods/2007_07.pdf
    January 01, 2007 - Centers for Medicare and Medicaid Services Provider of Services File SMG Freestanding Outpatient Surgery … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1. … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1. … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1. … Center Data COMPARISONS OF AMBULATORY SURGERY DATA SASD versus AHA CONCLUSION APPENDIX 1.
  18. hcup-us.ahrq.gov/reports/spotlights.jsp
    June 01, 2018 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … This study utilizes the 2011 State Inpatient Database (SID) , State Ambulatory Surgery Databases (SASD … California to investigate Post-Hospital Syndrome (PHS) and post-operative outcomes following elective surgery … This study used the 2005-2012 State Inpatient Database (SID) , State Ambulatory Surgery and Services
  19. hcup-us.ahrq.gov/datainnovations/clinicaldata/5MHAProjBenefits011508.jsp
    December 05, 2010 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … outcome rates with and without enhancement of its analytic database Risk-Adjusted Mortality - CABG Surgery … Chart of risk-adjusted mortality in percent for CABG surgery Chart shows confidence interval … risk-adjusted mortality, and p-value of predicted to observed percent risk-adjusted mortality for CABG surgery
  20. hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompnj.jsp
    March 01, 2007 - Classes Refined for ICD-10-PCS Tools for CPT and HCPCS Level II CCS for Services and Procedures Surgery … ICD-9-CM Utilization Flags for Revenue Center Codes and ICD-9-CM Procedure Classes for ICD-9-CM Surgery … and Senior Services provides one source file to HCUP that contains a mixture of inpatient, ambulatory surgery … Patient Type Flag with values listed below: 0 - Inpatient: Bill Type = 011X or 012X 1 - Same Day Surgery … outpatient services Emergency department charges for revenue codes 45x No operating room or ambulatory surgery

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