HCUP_AS indicates records that have evidence of ambulatory surgery (AS) services reported on the HCUP record. A value of 1 or more indicates that there is evidence of AS services. A value of 0 marks records that do not include evidence of AS services. It is possible that records with HCUP_AS=0 did in fact have AS services, but that information was not captured on the HCUP record.
Evidence of AS services includes:
- Ambulatory surgery ICD-9-CM procedure code on record. The ICD-9-CM AS procedure range includes codes 00.50-86.99 (excluded are procedure codes in the range 88.4-88.59 that were part of the 2003 screen for identifying records to be included in the SASD).
- Center for Medicare and Medicaid Services (CMS) approved ambulatory surgery center CPT-4/HCPCS procedure code on record. Yearly updates are downloaded from CMS at http://www.cms.hhs.gov/center/asc.asp. In general, the list includes CPT-4/HCPCS codes: 10121-69930, G0105, G0121, and G0260.
- Presence of at least one revenue center code in the following range: 036x (operating room services), 037x (anesthesia), 049x (ambulatory surgical care).
- Presence of a UB92 bill type of 83x indicating outpatient services.