Medicare supplement insurance plans are standardized by the federal government. Each is labeled with a letter. Every plan with the same letter offers the same benefits, no matter what state it’s offered in or by which insurance company. Massachusetts, Minnesota and Wisconsin standardized plans differently.
The level of coverage varies. There are standardized plans that cover all your Medicare deductibles, copayments and coinsurance, while others leave some costs for you to pay on your own. Medicare supplement plans provide nationwide coverage.