Does medicare have right to change me from tricare to part D??

I thought Tricare was for life. why did medicare anthem change me to their part D? says i can not change back till Jan.1st 2008

Medicare issues--particularly plan "peculiarities" that "happen" like the one you describe can be very challenging to sort out (even if you are a well-educated person!) If you would like specific help in answering this question from "real people"--I would highly recommend that you contact the Area Agency on Aging where you live.

Professionals at the Area Agency on Aging provide guidance in helping seniors like you --and their caregivers. Believe me, questions like this pop up and affect seniors' lives every day and Area Agency on Aging staff will know the best way to cut through the red tape to find out what is really going on in your situation. I am confident that you will find the professional staff there friendly and helpful--and they are not selling any particular Medicare plan or product. They will explain Medicare benefits and answer your questions in an easy-to-understand way. They also will know the latest "scoop" on changes that are still happening with Medicare plans in your state. (Yes, even now more changes are happening within these plans!)

If you live in the United States or one of the territories, there is an Area Agency on Aging serving where you live. You can call toll-free 1-800-677-1116 to find how to contact the one serving you.

If you do contact your local Area Agency on Aging and like the help that they give you, let your local county officials and your folks in Congress know. Area Agencies on Aging are funded under the Older Americans Act and they don't have big budgets! Your contribution to help provide important information and assistance services to you and to your older friends and neighbors would be appreciated--but is absolutely not required-- to get the help you need .

Good luck and best wishes!

It sounds like you have selected a Medicare Advantage Plan to replace traditional Medicare. If you provide proof of creditable prescription coverage (through Tricare), you will not be penalized for not signing up for Part D.
Contact Anthem and advise them that you do NOT want to have Part D coverage and ask them how to "provide proof of creditable coverage" -- they may want a copy of your Tricare eligibility.
Tell them you did not elect this Part D coverage and you want it switched back.
You can also call 1-800-MEDICARE for assistance (have your Medicare card ready).
Good luck