Columbia subject headings:
Health insurance premiums--United States.
Medicare+Choice Program (U.S.)
Medicare--Claims administration.
Medicare.
Harvard subject headings:
Health insurance--Premiums--United States.
Medicare+Choice Program (U.S.)
Medicare--Claims administration.
Medicare.
Princeton subject headings:
Health insurance--Premiums--United States.
Medicare+Choice Program (U.S.)
Medicare--Claims administration.
Medicare.