- 1,160
The insureds line of thinking was probably, "ok, I have to pay for Part B of Medicare, and, I have an ACA plan I'm currently paying for. I'll decline Part B".
There is no telling how many people with a fat subsidy are doing this and hoping they can get away with it. That may not be the case with the guy in the OP but it is with some.
Back in the day most people who weren't on group were overjoyed when they got Medicare because either they were uninsured or they were paying high premiums for major medical. Now some people who have been on a heavily subsidized ACA plan are getting sticker shock with Medicare, especially if they want a Supp, with that plus the Part B and D premiums.
Full retirement age being 66 seems to be an issue as well, as it works more seamlessly when SS and Medicare all start at the same time. It seems that I'm running into more and more people who have made mistakes with Part B because they didn't sign up in time. Others are forgetting to pay their Part B premium.