Do you have to sign up for Medicare when you sign up for Social Security?
When I began to receive Social Security I was covered by my wife’s insurance. So I did not sign up for Medicare.
When my wife retired I had to go to the social security office and explain why I was not already signed up and got signed up at that time.
However, you do not have to enroll in any other Medicare programs.
The only intersection of the SS and Medicare programs is when you turn 65 and Medicare Part A is mandated.
You will also be signed up for Part B but you can decline it to keep them from withdrawing $120 a month from your SS check every month.