Monthly Medicare Advantage (MA) enrollment indicator (May).
Source: Historically, most Medicare managed care plans have been health maintenance organizations (HMOs), hence the name of the variable.
This variable indicates whether the beneficiary was enrolled in a Medicare Advantage (MA) plan during a given month.
The 01 through 12 at the end of the variable name correspond with the month (i.e., 01 is January and 12 is December).
Source: CMS Common Medicare Environment (CME)
|0||Not a member of an HMO|
|1||Non-lock-in, CMS to process provider claims|
|2||Non-lock-in, group health organization (GHO; MA plan) to process in plan Part A and in area Part B claims|
|4||Fee-for-service participant in case or disease management demonstration project|
|A||Lock-in, CMS to process provider claims|
|B||Lock-in, GHO to process in plan Part A and in area Part B claims|
|C||Lock-in, GHO to process all provider claims|