It never occurred to me that an opt-out provider could/would take MA plans. What happens when you appeal an issue and the MA carrier still refuses your request? If the provider has opted-out of Medicare I would assume CMS has no authority to override the MA carrier.
There's a doctors group in North Tarrant County (Ft Worth) with 6 offices. They have NOT opted-out. However, the patients are informed at age 64, via mail, that they only accept 2 MA plans. It does NOT say that they do not take Medicare/Supplements.
So when I called to get the scoop and finally got the administrator, I got the same answer I had been given 5 other times, by 5 other people.
"We only accept MA 1 and MA 2".
If I asked another question, I got the same answer. If I asked if the docs had done opt-out, I got the same answer. It was very obvious they knew they were in the grey and didn't want to give any other answer. It was a script they were reading, probably approved by their lawyer.
I finally asked her if I could meet for a drink and buy her 1 or 2 margaritas to get a real answer. She hung up on me.