If your Medicare Advantage or Part D plan has inaccurate information about you (your name, date of birth, or address), you should contact Social Security to update that information. You will also want to reach out to your insurer to make sure they are aware so that you do not miss out an any correspondence while waiting for Social Security to update their information.
Likewise, if your plan is having a problem with billing or premium payments, you should call Social Security, and also contact your insurer to ask how you can help them update their information. Your insurer may be able to notate your account with the correct information while Medicare processes your updates. (The insurer’s phone number should be listed on your member I.D. card.)
You should also contact the insurer to change how you pay for your coverage, such as establishing direct debit from a bank account or allowing premiums to be deducted from your Social Security benefits.