Q. I am a Defense Department employee in CSRS. I am 57 and have 37-plus years of service. I can retire tomorrow with an annuity. I have been enrolled in a Federal Employees Health Benefits plan for the past five consecutive years (MHBP). I was just making an inquiry about Medicare, and my health plan provider representative told that after I retire and become eligible for Medicare at age 65, Medicare becomes my primary and my current health plan becomes secondary coverage (as far as payment is concerned). Is this true?