In our Local, we lose Aetna when we turn 65. I have Medicare Part A and B and a good supplement. When Aetna discovered I had purchased a supplement 4 months later they made me discontinue it because they said I still had Aetna. So I cancelled it, then 3 month later which was 7 months after I had turned 65, Aetna came back and said they had made a mistake and I no longer was covered by Aetna. You are required to purchase your supplemental insurance within 6 months of turning 65 or you will have to go through underwriting which means if you have preexisting conditions you can be turned down or pay a higher premium. It was a real mess. Could not get any help from my Local or UPS. Finally contacted Dept of Labor and they contacted UPS and it was resolved in 2 days.