Medigap, also called Medicare Supplement Insurance, pays for the services that Medicare doesn't; it compensates for the "gaps" in Medicare coverage, including copayments and deductibles.
Medigap policies are sold by approved private insurers. All Medigap plans are regulated by the government, and all should be clearly identifiable as Medicare Supplemental Insurance. In most states, Medigap plans are standardized and identified using letters A to N.
Medicare SELECT plans and Medigap Insurance plans offer similar benefits. The difference is that Medicare SELECT plans operate like managed care policies. This means that Medicare SELECT plan holders must use "in network" doctors and hospitals, and that carriers will only pay full benefits if customers use "preferred" health providers.
Medicare Advantage plans help people get Medicare benefits, while a Medigap policy only supplements Original Medicare benefits. Note: Medicare doesn't pay any of the costs for you to get a Medigap policy.
To qualify for a Medicare Supplement Insurance policy, you must have Medicare Part A and Part B. Medicare Supplement Insurance cannot be combined with Medicare Part C. Also, each person wishing to be covered by a Medicare Supplement Insurance policy must have their own plan -- a spouse cannot be covered under one's policy.
The best time to buy a Medigap policy is during your Medigap open enrollment period. This period lasts for 6 months and begins on the first day of the month in which you're both 65 or older and enrolled in Medicare Part B.
Some states offer additional open enrollment periods including those for people under 65. During this period, an insurance company can't refuse to sell you any Medigap policy, make you wait for coverage to start, or charge you more for a Medigap policy.
Every insurance company gets to decide how it will set its prices, or premiums, for Medigap policies. There are 3 ways to determine pricing:
Medigap plans are designed to make up for the out-of- pocket expenses that original Medicare does not cover. Typically, that means that Medigap plans cover copayments, coinsurance, and deductibles.
Thus, if a person enrolled in traditional Medicare purchases a private Medigap health insurance policy, Medicare will pay its share of the Medicare-approved amounts for covered health care costs, and the Medigap policy will pay for anything left over.
Medigap Insurance plans are standardized nationwide, with the exception of Massachusetts, Minnesota, and Wisconsin. Therefore, plans with the same letters must offer the same coverage, no matter where you live or what insurance company you use.
Medigap policies typically do not cover most dental care, routine eye care, eyeglasses, routine hearing tests, hearing aids, most care when traveling outside the United States, custodial care, long-term care, cosmetic surgery, most chiropractic services, routine foot care, and acupuncture.
Also, Medigap plans do not pay for prescription drugs. To get prescription drug coverage, one must buy a standalone Medicare Part D prescription drug plan.