Is a active medical plan still primary ...

over Medicare? UHC (may they be nuked from space) is telling me that my husbands employer has something in their contract that says that unless I tell them formally that I do not have Medicare, they can assume that they are secondary. Now, I haven’t worked in the insurance industry since 2007, but last I knew federal law required that active plans be prime to retirement plans. Has that changed? Or is UHC just trying to get out of paying claims?

If your husband’s employer has more than 20 employees their insurance would be primary; they have less than 20 employers Medicare would be primary.

More than 20. Sounds like there haven’t been any changes in the law since 2007.