As long as you still qualify, most likely you can keep your
TRICARE, VA, or
FEHBP prescription drug coverage.
Contact your benefits administrator or your insurer for information about your TRICARE, VA, or FEHBP coverage before making any changes.
It will almost always be to your advantage to keep your current coverage without any changes.
However, in some cases,
adding Medicare prescription drug coverage can provide you with extra coverage and, sometimes, lower copayments.
If you lose your TRICARE, VA, or FEHBP coverage and your Medicare drug coverage begins within 63 days, in most cases, you won’t have to pay a
premium penalty.
Also see:
(Primary Source: U.S. Department of Health & Human Services)