The ranking below weighs what does differ between insurers: financial strength, how premiums are set, household discounts, where each company sells, and how you apply. Mutual of Omaha’s No. 1 spot rests on its financial strength, household discount where available, and easy online buying.
The price comparisons below come from Medicare.gov’s Plan G listings in September 2026 for a 65-year-old woman and man who don’t use tobacco, in Dallas (75201), Columbus (43215), and Phoenix (85004). They don’t include household discounts, and your own price will depend on your age and where you live.
Best overall: 1. Mutual of Omaha Medicare Supplement Insurance
AM Best rates Mutual of Omaha Insurance Company A+ (Superior), and couples and housemates can save with its household discount where available. You can get an online quote without giving contact details, then apply online.
For more information, read our full Mutual of Omaha Medicare Supplement Insurance Review.
Best for agent help: 2. State Farm Medicare Supplement Insurance
Pick it if you want an agent to guide your application. Its Plan G was also the lowest-priced here in Phoenix for a woman and a man, and in Dallas for a man.
For more information, read our full State Farm Medicare Supplement Insurance Review.
Best for availability: 3. AARP Medicare Supplement Insurance
It’s the one insurer here you can buy in Massachusetts, where the others don’t sell. For a 65-year-old woman, its Plan G ranked in Dallas’s priciest third but mid-pack in Columbus and Phoenix.
For more information, read our full AARP Medicare Supplement Insurance Review.
Best for low premiums: 4. HealthSpring Medicare Supplement Insurance
HealthSpring’s Plan G had the lowest price here for a 65-year-old woman in Dallas and for a woman and a man in Columbus.
For more information, read our full HealthSpring Medicare Supplement Insurance Review.
Every Plan G covers the same care, so the insurer you pick decides your price, your discounts, and the company behind your coverage. Shoppers who want an established insurer should start with a Mutual of Omaha quote, and anyone buying on price alone should take the lowest Plan G quote for their age and ZIP code.
Advertiser Disclosure: Many or all of the offers that appear on this site are from companies that compensate us, and some companies pay for sponsored content. That compensation may influence which products we cover and where and how they appear on a page, including the order in which they appear. We do not include every company or offer available in the marketplace.
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