Client Has Wife's Employer Health Insurance and Medicare A/B

I don't sell a lot of Med Supps and most have been turning 65 clients. However I have a client who is 73 and is on his wife's employer's health insurance and has Medicare Part A/B. He uses his wife's coverage first then Medicare is secondary. His wife is retiring next month at 65 and will lose her healthcare coverage and go to Medicare. I know she is guaranteed issue or enrollment but since her husband already has Medicare A/B is he still eligible for guaranteed issue since he is losing his primary medical coverage?

I am in Tennessee and I have searched the internet for this exact situa

Source of insurance-forums.net