If you get TRICARE, your coverage will not change. If you decide that TRICARE drug coverage meets your needs, you can choose not to join a Medicare drug plan. You can keep your current coverage.
It will almost always be to your advantage to keep your current coverage without making any changes. An exception is if you qualify for Medicare's extra help. You may benefit by applying for the extra help.
TRICARE prescription drug coverage is considered creditable drug coverage, which means it is at least as good as Medicare drug coverage. If you decide you want to join a Medicare drug plan after you are first eligible, you won't have to pay a late enrollment penalty if you join within 63 days of involuntarily losing your TRICARE coverage. If you don't lose your coverage and you want to join a Medicare drug plan, you must wait for a valid enrollment period. You will not have to pay a late enrollment penalty.
If you have TRICARE coverage and you choose to disenroll from your Medicare drug plan, you get a special enrollment period to do so.
You should contact TRICARE before making any changes to your drug coverage.
Although you can have both TRICARE and a Medicare drug plan, the Medicare drug plan will always pay first for Medicare-covered drugs. TRICARE will then pay for TRICARE-covered drugs. Please contact the TRICARE Pharmacy Program at 1-877-363-6337 for more information.
To use the TRICARE Mail Order Program, call 1-866-363-8667, or for the TRICARE Retail Network Pharmacy Program, call 1-866-363-8779.
For additional information, please contact TRICARE at 1-888-363-5433. TTY users should call 1-877-535-6778.
(Source: U.S. Department of Health & Human Services)