Medicare Supplement (Medigap) insurance is well known for covering Medicare's deductibles and coinsurance. But there are several facts about Medigap that even experienced beneficiaries often do not know. Understanding these details can help you make smarter coverage decisions and avoid costly surprises.
1. Plans Are Standardized, But Prices Vary Dramatically
All Medigap plans of the same letter offer identical benefits regardless of which insurance company sells them. This is required by federal law. However, the monthly premiums can vary dramatically between carriers for the exact same coverage. Two companies selling Plan G in the same zip code might charge $120 per month and $200 per month respectively. This is why comparison shopping is essential. The benefits are identical, so the only meaningful differences are price and the carrier's history of rate increases.
2. Grandfathered Plans Offer Coverage No Longer Available to New Enrollees
Medicare Supplement Plan F and Plan C, which cover the Part B deductible, were eliminated for new Medicare beneficiaries starting January 1, 2020. However, if you enrolled in Plan F or Plan C before that date, you can keep your plan indefinitely. If you have a grandfathered Plan F, you are receiving coverage that new enrollees cannot get. This is a significant benefit worth preserving, even if premiums rise over time.
3. Most Plans Add 365 Hospital Days Beyond Medicare's Limits
Original Medicare Part A covers inpatient hospital stays, but coverage ends after 90 days in a benefit period plus 60 lifetime reserve days. Most Medigap plans add an additional 365 days of hospital coverage beyond what Medicare covers, at no cost to you. This means if you face a catastrophic illness requiring an extended hospital stay, your Medigap plan provides a full year of additional coverage after Medicare's benefits are exhausted.
4. Emergency Care Is Covered Outside the United States
Original Medicare generally does not cover medical care received outside the United States. However, most Medigap plans (Plans C, D, F, G, M, and N) include a foreign travel emergency benefit that covers 80% of emergency care costs abroad after a $250 deductible, up to a $50,000 lifetime maximum. This makes Medigap particularly valuable for beneficiaries who travel internationally.
5. Your Policy Is Guaranteed Renewable for Life
Once you are enrolled in a Medigap plan, the insurance company cannot cancel your coverage as long as you pay your premiums, even if your health deteriorates significantly. This guaranteed renewability is a federal requirement for all Medicare Supplement plans. It is a major advantage over other types of insurance: your Medigap plan will be there when you need it most, regardless of your health status.
The Best Time to Enroll Is During Open Enrollment
Your Medigap Open Enrollment Period begins the month you are both age 65 and enrolled in Medicare Part B. During this 6-month window, you have guaranteed issue rights: insurers must sell you any Medigap plan at standard rates regardless of your health. After this window closes, you may be subject to medical underwriting in most states.
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