A Medicare Supplement, or Medigap policy, sold by private insurance companies, can help pay some of the health care costs ("gaps") that Original Medicare doesn't cover, like copayments, coinsurance, and deductibles. Some Medigap policies also offer coverage for services that Medicare doesn't cover, like medical care when you travel outside the U.S. If you have Original Medicare and you buy a Medigap policy, both plans will pay their share of Medicare-approved amounts for covered health care costs.
Every Medigap policy must follow Federal and state laws designed to protect you, and it must be clearly identified as "Medicare Supplement Insurance." Medigap insurance companies can sell you only a "standardized" Medigap policy identified in most states by letters (A through L). Each standardized Medigap policy must offer the same basic coverage, no matter which insurance company sells it. Cost is usually the only difference between Medigap policies sold by different insurance companies.
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