New Jersey Medicare AdvisoryBy New Jersey Medicare Advisory • April 26, 2026
Navigating Medicare can feel overwhelming, especially when you're trying to understand how to minimize your out-of-pocket healthcare costs. Medicare Supplement Insurance, commonly called Medigap, is designed to help fill the "gaps" in Original Medicare coverage. These standardized plans can provide valuable financial protection and peace of mind. Let's explore how Medigap works and how to choose the right plan for your needs.
Medigap policies are sold by private insurance companies to help pay for costs that Original Medicare (Parts A and B) doesn't cover. These out-of-pocket expenses include copayments, coinsurance, and deductibles. When you have both Original Medicare and a Medigap policy, Medicare pays its share of the approved amount for covered healthcare services, and then your Medigap policy pays its share.
It's important to understand that Medigap policies only work with Original Medicare—they don't work with Medicare Advantage Plans. You also cannot have both a Medigap policy and a Medicare Advantage Plan at the same time. Medigap policies generally don't cover prescription drugs, so you'll typically need to enroll in a separate Medicare Part D plan for drug coverage.
Medigap policies are standardized and identified by letters: A, B, C, D, F, G, K, L, M, and N. Each lettered plan offers a different combination of benefits, and the coverage for each plan letter is the same regardless of which insurance company sells it. This standardization makes it easier to compare plans from different insurers—you're essentially comparing prices and customer service rather than benefits.
Plans F and C are no longer available to people who became eligible for Medicare on or after January 1, 2020, though those who already have these plans can keep them. Plan G has become one of the most popular choices because it offers comprehensive coverage similar to Plan F.
The plans vary in what they cover. Some plans (like G and F) offer more comprehensive coverage with higher premiums, while others (like K and L) offer lower premiums but require you to pay a larger share of costs. Plans K and L also have an annual out-of-pocket limit, after which the plan pays 100% of covered services for the rest of the calendar year. Plan N requires small copayments for certain doctor visits and emergency room visits that don't result in admission.
Medigap premiums vary based on several factors, including which plan letter you choose, which insurance company you select, your age, your location, and whether you use tobacco. In New Jersey, insurance companies can use different pricing methods, which affects how your premium may change over time.
The best time to buy a Medigap policy is during your Medigap Open Enrollment Period, which lasts for six months and begins the month you're 65 or older and enrolled in Medicare Part B. During this period, you have guaranteed issue rights—insurance companies cannot deny you coverage, charge you more, or make you wait for coverage to start due to pre-existing health conditions.
You may also have guaranteed issue rights in certain special situations, such as when you're losing other coverage through no fault of your own. These rights are important because outside of these protected periods, insurance companies can use medical underwriting and potentially deny coverage or charge higher premiums based on your health status.
Selecting the right Medigap plan involves balancing your healthcare needs, budget, and preferences. Consider how often you visit doctors, whether you travel frequently, and how much financial predictability you want in your healthcare expenses.
If you want comprehensive coverage and predictable costs with minimal out-of-pocket expenses when you receive care, Plans G or N might be worth considering despite higher premiums. If you're healthy, don't visit doctors often, and want to save on monthly premiums, a high-deductible plan or Plans K or L might suit your situation better.
Remember that while all insurance companies must offer the same benefits for each plan letter, premiums can vary significantly between companies. It pays to shop around and compare quotes from multiple insurers.
Choosing the right Medicare Supplement plan is an important decision that depends on your unique healthcare needs and financial situation. The licensed Medicare advisors at New Jersey Medicare Advisory are here to help you understand your options, compare plans, and find coverage that fits your needs and budget. Call us today at 856-221-7051 for a free, no-obligation consultation. We're committed to helping New Jersey residents navigate Medicare with confidence.