If entitled to Medicare Part A, you're not required to have Medicare Part B to purchase TRICARE Retired Reserve.
Even though you're not required to have Medicare Part B, we strongly encourage you to sign up for Part B when you are first eligible. If you don't you may be required to pay the Medicare Part B Late Enrollment PenaltyYour monthly premium for Part B may go up 10% for each full 12-month period that you could have had Part B, but didn't sign up for it..
Learn more about TRICARE Retired Reserve
Last Updated 1/8/2016
Fax: 1-502-335-9980 (Primary) or 1-831-655-8317 (Alternate)
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Social Security Administration
Medicare Part D
Becoming Medicare Eligible
TRICARE Retired Reserve