Change the ID numbers for Medicare to random numbers.
Why is this important?
Identity theft of social security numbers is growing by leaps and bounds. I now have to prove I'm "me" because someone chose to use my social security number to file taxes with the IRS. We're told never to carry our social security cards in our wallets to protect against theft, while always having to carry our Medicare cards for proof of health insurance. Stop using social security numbers for Medicare ID numbers.