Consider giving Chris Westfall a call. He helped me wade thru the murky jungle of Medigap plan pricing.
I live in Michigan and he found me a Plan G thru Aetna for $113./mo last October when I had to sign up for Medicare. I recommended Chris to some friends. A 69-year old accountant I know ended up calling Chris and saving about $400/month by switching to a lower cost plan.
Chis is licensed in many states. I don't know if NY is one of them.
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This is a very busy time of year due to Medicare enrollment, so I'd suggest contacting Chris after this enrollment period ends.