Medigap Plans – The Same as Medicare Supplement Plans

Original Medicare (Part A and Part B) is the basic Medicare benefit package granted to eligible individuals when they turn 65 or enter their 25th month of receiving disability benefits. Original Medicare provides broad coverage of many hospital and medical expenses. But Medicare comes with out-of-pocket costs. Medigap insurance plans, also known as Medicare Supplement plans, may cover Medicare copayments, deductibles, coinsurance, and other expenses not covered through the basic benefit package.

There are 10 standardized Medigap plans denoted by the letters A through N in 47 states (Medigap Plans E, H, I and J are no longer sold). Massachusetts, Minnesota, and Wisconsin have their own standardized Medigap plans.

  • Plans having different letter names (for example, Medigap Plan L and Medigap Plan M) have different levels of coverage.
  • Plans having the same letter name (such as every Medigap Plan L) include the same coverage no matter where you buy them. However, not every Medigap Plan L will necessarily charge the same premium.
  • Please note that some companies may offer additional innovative benefits.

Because Medigap plans are offered by private insurance companies, the cost and availability of each lettered plan may differ. Not every insurance company offers all 10 plans. Some popular Medigap plan types are more comprehensive than other Medigap plan types; they cover the basic benefits and may also cover foreign travel emergencies and excess charges.

To be eligible to enroll in a Medigap plan, you must be enrolled in both Medicare Part A and Part B, and reside in the plan’s service area. Be aware that each Medigap policy only covers one person.

The best time to enroll in a Medigap plan is typically during your Medigap Open Enrollment Period, which begins on the first day of the month that you are both enrolled in Medicare Part B and aged 65 or older. This enrollment period lasts for six months. During this time, you have the guaranteed issue right to enroll in any Medigap plan that’s available in the area where you live, regardless of your health status. Outside of this enrollment period, you may be subject to medical underwriting, and may be denied coverage based on a pre-existing condition.

This website and its contents are for informational purposes only. Nothing on the website should ever be used as a substitute for professional medical advice. You should always consult with your medical provider regarding diagnosis or treatment for a health condition, including decisions about the correct medication for your condition, as well as prior to undertaking any specific exercise or dietary routine.


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The purpose of this communication is the solicitation of insurance. Contact will be made by an insurance agent/producer or insurance company. Medicare Supplement insurance plans are not connected with or endorsed by the U.S. government or the federal Medicare program.

eHealth's Medicare website is operated by eHealthInsurance Services, Inc., a health insurance agency licensed to sell Medicare products.

Medicare has neither reviewed nor endorsed this information.