18. MEDICARE ENTITLEMENT/BUY-IN CHAR 1 48 48 OCCURS: 12 TIMES INDICATOR CODES: 0 = NOT ENTITLED 1 = PART A ONLY 2 = PART B ONLY 3 = PART A AND PART B A = PART A, STATE BUY-IN B = PART B, STATE BUY-IN C = PARTS A AND B, STATE BUY-IN