New Jersey Medicare AdvisoryBy New Jersey Medicare Advisory • May 28, 2026
If you're enrolled in Original Medicare (Parts A and B), you've probably noticed that it doesn't cover everything. Deductibles, coinsurance, and copayments can add up quickly. That's where Medicare Supplement Insurance, commonly called Medigap, comes in. These policies are designed to help fill the "gaps" in Original Medicare coverage, giving you more predictable healthcare costs and greater peace of mind.
Medigap policies are sold by private insurance companies but are standardized by the federal government. This means that a Plan G from one company offers the same basic benefits as a Plan G from another company, though premiums may differ.
Here's how it works: Original Medicare pays its share of approved healthcare costs first, then your Medigap policy pays its share according to your plan's benefits. You'll typically show both your red, white, and blue Medicare card and your Medigap insurance card when receiving services. Most healthcare providers who accept Medicare will accept your Medigap coverage, giving you flexibility to see doctors nationwide without network restrictions.
It's important to note that Medigap policies only work with Original Medicare. If you're enrolled in a Medicare Advantage Plan (Part C), you cannot use a Medigap policy, as Medicare Advantage plans already include coverage that works differently from the Original Medicare plus Medigap combination.
Medigap policies are identified by letters: A, B, C, D, F, G, K, L, M, and N. Each letter represents a different standardized benefit package. Plans C and F are no longer available to people who became eligible for Medicare on or after January 1, 2020, but those who already have these plans can keep them.
The most comprehensive plans typically cover more out-of-pocket costs but come with higher monthly premiums. Plan G has become increasingly popular as it covers nearly everything except the Part B deductible. Plan N offers solid coverage at a lower premium but requires small copayments for certain doctor visits and emergency room visits that don't result in admission.
Plans K and L are considered "cost-sharing" plans that cover a percentage of costs rather than paying them in full, which results in lower premiums but more out-of-pocket expenses. Plans M and N offer middle-ground options with partial coverage of certain benefits.
The key is understanding that while the benefits are standardized, insurance companies set their own premiums, so shopping around is essential.
Medigap premiums vary based on several factors. Insurance companies may price policies using community-rated (same price for everyone), issue-age-rated (based on your age when you buy), or attained-age-rated (increases as you get older) methods. Understanding how your premium might change over time is crucial for long-term planning.
Your best opportunity to enroll in a Medigap policy is during your Medigap Open Enrollment Period, which lasts for six months and begins when you're both 65 or older and enrolled in Medicare Part B. During this period, you have guaranteed issue rights, meaning insurance companies cannot deny you coverage or charge you more due to pre-existing health conditions.
There are other guaranteed issue situations as well, such as when you're losing other coverage through no fault of your own. These special rights protect consumers during specific life circumstances, but they're time-sensitive, so understanding when they apply is important.
Selecting the right Medigap plan involves balancing your healthcare needs, budget, and risk tolerance. Consider factors like how often you visit doctors, whether you travel frequently, your current health status, and your financial situation.
If you prefer predictable costs and comprehensive coverage, a more complete plan might suit you best, even with higher premiums. If you're generally healthy and willing to pay some out-of-pocket costs in exchange for lower monthly premiums, a plan with cost-sharing features might be appropriate.
Remember that you can switch Medigap plans, but after your initial enrollment periods, you may face medical underwriting, which could result in higher premiums or denial of coverage based on your health status.
Navigating Medicare Supplement options doesn't have to be overwhelming. The licensed advisors at New Jersey Medicare Advisory are here to help you understand your options, compare plans, and find coverage that fits your unique situation. We'll walk you through the details at no cost to you and help ensure you're making an informed decision.
Call us today at 856-221-7051 to schedule your free consultation and discover which Medigap plan is right for you.