Ambulatory Surgery Center Events

SAS Name

This variable is the count of events in the part B ambulatory surgery center (ASC) setting for a given year. An event is defined as each line item that contains an ASC service.

ASC claims are a subset of the claims in the Part B Carrier data file. The ASC claims are identified by the claim lines where the LINE_CMS_TYPE_SRVC_CD ='F'.


There are 11 cost/use categories from the Carrier Part B and DME data files – the ASC, Anesthesia, Part B Drug, Physician, E & M, dialysis, imaging, tests, other procedures, DME and other carrier claims.

Source: CCW (derived)

Null/missing or 1-XXX