No Purchase is forced in Medicare, part B is optional, Federal Retiree’s and any one keeping their Major Medical have Medicare as a secondary.
That is not exactly what I call optional, it is like having a choice of entrees for dinner but being told that you MUST eat. Optional means you can opt out altogether. I “opted out” of part B because I have a VA clinic within three miles of my house but I had to file papers saying that I had VA coverage or pay for part B. Truly optional would mean that I could take it or leave it without having to file papers showing other coverage.