12. CURRENT REASON FOR           CHAR      1    41   41  THIS FIELD INDICATES THE REASON FOR THE
       ENTITLEMENT CODE                                     BENEFICIARY'S CURRENT ENTITLEMENT TO MEDICARE
                                                            BENEFITS.
                                                            CODES:
                                                            0 = OLD AGE AND SURVIVOR'S INSURANCE (OASI)
                                                            1 = DISABILITY INSURANCE BENEFITS (DIB)
                                                            2 = ESRD
                                                            3 = DIB AND ESRD
                                                            SOURCE:
                                                            ENROLLMENT DATA BASE