Updated July 2, 2026
Missouri follows standard federal Medigap rules. The full set of lettered plans is available from multiple carriers, and Plan G: the most popular option among new Medicare enrollees in most states: averages around $130 per month here.
How Are Medigap Premiums Calculated in Missouri
Medigap benefits are set by federal law, so the Plan G you buy from one Missouri carrier covers the same things as the Plan G from any other. The premium is the variable. Carriers can use attained-age, issue-age, or community rating, and Missouri allows all three. Attained-age policies typically start cheapest and increase annually; issue-age policies lock your premium to the age you were when you enrolled; community-rated policies charge everyone the same regardless of age. None of those methods is universally better. It depends on how long you expect to keep the policy and what you can budget now versus later. Use the Medigap cost calculator for an age-adjusted estimate and the plan comparison page to see what each letter covers before you quote.
Enrolling in Missouri
Federal open enrollment rules give you 6 months to apply for any Medigap plan without medical underwriting. That window opens when you are at least 65 and your Part B starts. Miss it and Missouri insurers can: and often do: ask health questions and decline coverage. The open enrollment calculator will show your exact window. The Medigap vs Advantage calculator is useful if you want to run numbers on both paths before committing.
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FAQs
How much does Medigap Plan G cost in Missouri?
Plan G premiums in Missouri run around $130 a month for most new enrollees, though your exact rate depends on your age, sex, tobacco use and the insurer you choose.
Do all Plan G policies in Missouri cover the same things?
Yes. Federal law standardizes the benefits inside every Plan G, so a policy sold in Missouri covers exactly the same services no matter which carrier issues it. Only the premium and the rating method differ from one Missouri carrier to the next.