This variable counts the number of months during the year that the beneficiary received their Part A and Part B benefits through a managed care plan (i.e., a Medicare Advantage [MA] plan) instead of the traditional fee-for-service (FFS) program. Any month where the HMO indicator variable (HMOINDXX) was anything other than a 0 (not a member of an HMO) or a 4 (FFS participant in a case or disease management demonstration project) is counted as a MA month.
This variable counts the number of months during the year that the beneficiary received their Part A and Part B benefits through a managed care plan (i.e., a Medicare Advantage [MA] plan) instead of the traditional fee-for-service (FFS) program. Any month where the HMO indicator variable (HMOINDXX) was anything other than a 0 (not a member of an HMO) or a 4 (FFS participant in a case or disease management demonstration project) is counted as a MA month.
Source: CMS Common Medicare Environment (CME)