@kenporter
There is big differeence between Medicare and Medicare Advantage. Medicare Advantage is NOT Medicare but a private insurance plan in lieu of original Medicare.

Medicare does cover PSMA. I had mine covered and many others will tell you the same. A Medicare Advantage plan is going to have their own rules and policies especially which provider you can see and what test.

If they are going to stick to what Medicare policy is contact Medicare and asked if they cover PSMA. Then send that information to your Medicare Advantage. I think but just my opinion your Medicare Advantage Plan is trying not to pay for your PSMA as is NOT the policy of Medicare. Now Medicare does require you get services from an institution or provider that takes Medicare.