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)