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This variable is contained in the following files: Master Beneficiary Summary File (MBSF) Base
Short SAS Name
SAS Name

Months of Part A coverage


This variable is the number of months during the year that the beneficiary had Medicare Part A coverage. (This is sometimes referred to as health insurance coverage - or Medicare HI coverage).

CCW derives this variable by counting the number of months where the beneficiary had Part A coverage (i.e., the BUYINXX variable equaled 1, A, 3, or C).

Source: CMS Common Medicare Environment (CME) (derived)

Code value