There is a real Medigap comparison chart and Medicare publishes it, but it is not the chart most people are looking for. It compares what each standardised letter COVERS, which is fixed in federal law and therefore genuinely comparable. It does not compare what each letter COSTS, and no honest chart could, because a Medigap premium is not a published number.
What the official chart actually compares
The chart runs the standardised letters across the top and the benefits down the side: Part A coinsurance and additional hospital days, Part B coinsurance, the blood benefit, hospice coinsurance, skilled nursing coinsurance, the Part A deductible, the Part B deductible, Part B excess charges and foreign travel emergency care. Each cell says whether the letter covers the benefit in full, covers a stated percentage, or does not cover it. Two letters carry an out-of-pocket limit instead: $8,000 for Plan K and $4,000 for Plan L in 2026.
Why no chart carries the prices
Medigap is rated by the insurer on age, location, sometimes tobacco use, and often on medical underwriting, so there is no single number to publish. A site that shows you a premium is either showing you one person's quote or an average nobody is charged. This site quotes no premium at all, which is the same discipline it applies everywhere: a figure that is not published cannot be quoted, and a provider that publishes nothing is recorded as not publishing rather than estimated.
The comparison this site can make
What is published, for every state, is how people actually hold Medicare, and this index carries it: the share who moved to Medicare Advantage against the share who kept Original Medicare, from CMS's own monthly enrollment file, with the field and the date it was read. That is a real comparison chart, it is about the choice rather than about the price, and it is the one that tells a reader whether the arrangement they are considering is the ordinary one where they live.
Questions people ask about medigap cost comparison chart
Where is the official Medigap chart?
On Medicare.gov, linked below. It is the benefit chart; it does not carry premiums, and that is deliberate.
Why can I not find a Medigap price list?
Because there is not one. Premiums are set per insurer, per state and per applicant, often with underwriting, so no published list would be true of anyone.
Do the letters really cover the same things everywhere?
The standardised letters do, by federal law. Three states run their own standardisation systems instead, and Medicare's own page is the authority on that.
What does this site compare, then?
How Medicare is held in each state, from CMS's enrollment file: Advantage against Original Medicare, stand-alone Part D, and dual eligibility.