These are general comments not geared to any specific provider, but comments are based on my 15+ years of dealing with original Medicare for my husband and me. Nothing contained herein refers to Medicare Advantage. I’d also suggest you become very familiar with Medicare.gov. Anyway, if you’re asking about a medigap policy, I assume you will be adding Part B coverage. When you select your medigap policy don’t forget that the price for any medigap policy will increase every year. My first purchase was online from a well known insurance company with a competitive price. After seeing rather large price increases every year, I ended up contacting an independent agent and found out I needed to be asking which companies had the smallest % increases from year to year. Have now been with same company nobody ever heard of for 10 years. Have never had a minute’s problem with this company. You’ll also need a part D drug plan and that’s something you need to review annually to see if you need to change companies, depending on what drugs you’re taking. My husband hasn’t started treatment yet but doc told us what drugs would be used—one will be an injection in doc’s office and & will come under part B of Medicare , while the pills he’ll use come under Part D. I made our selection for husband’s Part D for 2023 based in
large part on price of generic revlimid + price of his regular meds with this company . You’ll have to balance costs of plans with deductibles, without deductibles, which pharmacies have “preferred pricing,” etc. Many pharmacies will guide you in making a Part D selection but it’s really easy to do online at Medicare.gov.

United healthcare has a good plan F. The premiums gets increases but not more so much during lifetime, I highly recommend.

I have the classic Plan A, B and D.
I have a supplemental plan F
And I am in California, I have Medicaid and choose to have prescriptions under a plan Humana supplement (?) that covers my prescriptions.