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hcup-us.ahrq.gov/db/nation/nass/nasschecklist.jsp
November 01, 2024 - Examples include ambulatory surgeries such as cataract surgery, cholecystectomy, appendectomy, gastric … In-scope surgeries are procedures flagged as "narrow" in the HCUP Surgery Flag Software for Services … Because the SASD do not include ambulatory surgery encounters that were subsequently admitted to the … Information on patients admitted to the hospital following ambulatory surgery is included in the HCUP … The NASS is designed for national or regional level analyses of ambulatory surgery-related care.
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompin.jsp
September 01, 2024 - A new definition of an ambulatory surgery record as of October 1, 2015 with the
transition to ICD … Beginning in 2022, IHA adopted new surgery flag definitions which increased the
number of surgeries … Selection of Records for Inclusion in the SASD
All records identified by IHA as ambulatory surgery … IHA does not collect data from ambulatory surgery
facilities that are not owned by a hospital. … Hospital-owned
ambulatory surgery and other outpatient care facilities may be contained within the
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompnd.jsp
August 01, 2025 - Ambulatory surgery records must have an accompanying CPT procedure and revenue center code as specified … The ambulatory surgery flag provided by MHA is used to set the HCUP data element STATE_AS. … Selection of Records for Inclusion in the SASD
All records identified by MHA as ambulatory surgery … are included in the SASD (STATE_AS=1 based on the ambulatory surgery flag). … Data from ambulatory surgery facilities that are not owned by a hospital are not included.
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hcup-us.ahrq.gov/news/exhibit_booth/NASSBrochure_031220.pdf
March 18, 2020 - The Nationwide Ambulatory Surgery Sample
(NASS) is part of the family of databases and
software tools … The NASS
produces national estimates of major ambulatory
surgery encounters performed in hospital-owned … Address Critical Topics
Rely on the NASS to study national ambulatory
surgery encounters, including: … encounters
• Charges for select ambulatory surgery services
• Quality of ambulatory surgery care
• Impact … surgery services
by special populations
Nationwide Ambulatory
Surgery Sample (NASS)
A Comprehensive
-
hcup-us.ahrq.gov/db/nation/nass/2020_NASS_Introduction.pdf
January 01, 2020 - ; NASS, Nationwide Ambulatory Surgery Sample. … The ambulatory surgery accounts for at least .05% of total
ambulatory surgery volume in the SASD or … Hospitals are reliably submitting ambulatory surgery data. … Hospitals are reliably submitting ambulatory surgery data. … The surgery may be performed in
operating suites also used for inpatient surgery, specially designated
-
hcup-us.ahrq.gov/sasdoverview.jsp
July 01, 2025 - and Services Databases (SASD)
The State Ambulatory Surgery and Services Databases (SASD) are part … The specific types of ambulatory surgery and outpatient services included in each SASD vary by State … All SASD include data from hospital-owned ambulatory surgery facilities. … All SASD include data from hospital-owned ambulatory surgery facilities. … Used with the SID, the SASD may be used to compare inpatient surgery data with ambulatory surgery data
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompak.jsp
June 01, 2024 - 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 … These facilities are mostly nonhospital-owned
surgery centers. … Identification of Hospital-Owned Ambulatory Surgery and Other Types of
Outpatient Facilities in … Hospital-owned ambulatory surgery and other outpatient care
facilities may be contained within the
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompsd.jsp
June 01, 2024 - Ambulatory surgery defined by revenue codes 0360-0369 for operating room services, 0480 for cardiology … The record type is also used to assign the HCUP data elements STATE_AS (ambulatory surgery record) and … Selection of Records for Inclusion in the SASD
All records identified by SDAHO as ambulatory surgery … are included in the SASD (STATE_AS=1 based on the ambulatory surgery flag). … SDAHO does not collect data from ambulatory surgery facilities that are not owned by a hospital.
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecomphi.jsp
May 01, 2020 - HHIC defines ambulatory surgery as same-day hospital surgery events that are performed on an outpatient … Starting in data year 2011, observation service encounters are included with the ambulatory surgery data … Selection of Records for Inclusion in the SASD
All records identified by HHIC as ambulatory surgery … HHIC does not collect data from ambulatory surgery facilities that are not owned by a hospital. … Identification of Hospital-Owned Ambulatory Surgery and Other Types of Outpatient Facilities in the SASD
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompmi.jsp
April 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 … stays, as long the ambulatory surgery criteria described above are met. … Selection of Records for Inclusion in the SASD
All records identified as ambulatory surgery by MHA … Identification of Hospital-Owned Ambulatory Surgery and Other Types of Outpatient Facilities in the SASD
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompmo.jsp
June 01, 2024 - 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 observation services is only flagged as ambulatory surgery. … However, ambulatory surgery records with evidence of observation services can be identified by HCUP data … Selection of Records for Inclusion in the SASD
All records identified by HIDI as ambulatory surgery
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hcup-us.ahrq.gov/db/vars/pointoforiginub04/nisnote.jsp
October 04, 2025 - center
E
Transfer from Ambulatory Surgery Center
F
Transfer from hospice
F
Transfer … Center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice and is under a … center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice
F
Transfer … Center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice and is under a … center
E
Transfer from Ambulatory Surgery Center
F
Transfer from hospice and is under a
-
hcup-us.ahrq.gov/tech_assist/index_stu.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 … Databases (SASD) - Data Elements
State Ambulatory Surgery Databases (SASD) - Data Use Agreement … State Ambulatory Surgery Databases (SASD) - Overview
State Ambulatory Surgery Databases (SASD) - Purchasing … data
State Ambulatory Surgery Databases (SASD) - Reports
State data - Ambulatory Surgery
State
-
hcup-us.ahrq.gov/news/archives.jsp
January 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 … Past Events
2021
October 7, 2021
An In-Depth Exploration of the HCUP Nationwide Ambulatory Surgery … April 21, 2021
An In-Depth Exploration of the HCUP Nationwide Ambulatory Surgery Sample (NASS)
Webinar … NE
State Ambulatory Surgery and Services Databases (SASD): KY, MD, NE
State Emergency Department
-
hcup-us.ahrq.gov/db/vars/pointoforiginub04/kidnote.jsp
October 04, 2025 - center
E
Transfer from Ambulatory Surgery Center
F
Transfer from hospice
F
Transfer … Center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice and is under a … center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice
F
Transfer … Center
E
Transfer from ambulatory surgery center
F
Transfer from Hospice and is under a … center
E
Transfer from Ambulatory Surgery Center
F
Transfer from hospice and is under a
-
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.
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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 provide ambulatory surgery and outpatient
services from nonhospital-owned
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hcup-us.ahrq.gov/db/vars/total_as_encounters/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 … HCUP Surgery Flag Software for Services and Procedures was used to identify surgical procedures of interest … The Surgery Flag Software processes CPT procedure codes and classifies them as narrow, broad, or neither … NNNNN AS encounters with at least one narrow surgery
Top
Internet
-
hcup-us.ahrq.gov/db/vars/ncpt_inscope/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 … HCUP Surgery Flag Software was used to identify surgical procedures of interest for the NASS. … The Surgery Flag Software processes CPT procedure codes and classifies them as narrow, broad, or neither … Note that although encounters are limited to those with at least one "in-scope" major ambulatory surgery
-
hcup-us.ahrq.gov/reports/methods/EvalofSASD1999Final.pdf
June 13, 2003 - SURGERY DATA
Visit Level Data
1999 HCUP State Ambulatory Surgery Databases (SASD)
Ambulatory … surgery centers. … surgery. … outpatient surgery centers. … to all surgery centers.