Central Distributor SASD: Description of Data Elements

HCUP_AS - HCUP indicator of ambulatory surgery record

Documentation Sections:

General Notes

Uniform Values

State Specific Notes

General Notes

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.

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Uniform Values

Variable Description Value Value Description HCUP_AS HCUP indicator of ambulatory surgery record 0 Record does not meet any HCUP Ambulatory Surgery criteria 1 Ambulatory Surgery ICD-9-CM procedure code on record 2 Ambulatory Surgery CPT procedure code on record 3 Ambulatory Surgery revenue code on record 4 UB-92 bill type of "83X"

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State Specific Notes

Maryland Beginning in 2007, Maryland included the records for encounter type 05 from all other outpatients, Greenbaum cancer center, and UMMS shock trauma in the unified AS and ED outpatient data file. Previously, Maryland only included outpatient records with encounter types 01-04 in the file provided to HCUP. The inclusion of these new records resulted in a large increase in the frequency of HCUP_AS = 0 or HCUP_AS = 1.

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