New Jersey Medicare AdvisoryBy New Jersey Medicare Advisory • May 21, 2026
If you're enrolled in Original Medicare (Parts A and B), you've likely noticed that it doesn't cover everything. Deductibles, copayments, and coinsurance can add up quickly. That's where Medicare Supplement Insurance, also called Medigap, comes in. These policies are designed to help fill the "gaps" in Original Medicare coverage, providing you with more predictable healthcare costs and greater peace of mind.
Medigap policies are sold by private insurance companies but are standardized by federal and state regulations. When you have a Medigap plan, it works alongside your Original Medicare coverage. Here's how it typically works: Medicare pays its share of approved healthcare costs first, then your Medigap policy pays its share according to your plan type.
It's important to understand that Medigap only works with Original Medicare—not with Medicare Advantage plans. You must be enrolled in both Medicare Part A and Part B to purchase a Medigap policy. These plans don't include prescription drug coverage, so you'll need to enroll in a separate Medicare Part D plan if you want medication coverage.
Medigap policies are identified by letters, and each letter represents a different standardized benefit package. In most states, including New Jersey, you'll find plans A, B, C, D, F, G, K, L, M, and N available. Each plan offers a different combination of benefits.
Plans F and G are among the most comprehensive options, covering most out-of-pocket costs. However, Plan F is only available to those who became eligible for Medicare before January 1, 2020. For those newly eligible, Plan G has become a popular choice as it offers similar comprehensive coverage.
Plans K and L offer lower monthly premiums but require you to pay a higher percentage of costs, up to an annual out-of-pocket limit. Plans M and N provide moderate coverage with cost-sharing features that help keep premiums lower than the most comprehensive plans.
The key point to remember is that Plan G from one insurance company offers the exact same benefits as Plan G from another company—the only differences are the monthly premium and the insurance company's customer service reputation.
Medigap premiums vary based on several factors, including which plan letter you choose, which insurance company you select, and sometimes your age and location. Insurance companies may use different pricing methods, such as community-rated, issue-age-rated, or attained-age-rated premiums.
The best time to buy a Medigap policy is during your Medigap Open Enrollment Period, which lasts for six months and begins when you're 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.
You may also have guaranteed issue rights in certain special situations, such as when you're losing other coverage or when your Medicare Advantage plan is leaving your area. Understanding these rights is crucial because outside of these periods, insurance companies can use medical underwriting, potentially making coverage more expensive or difficult to obtain.
Selecting the right Medigap plan depends on your individual 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 prefer comprehensive coverage with minimal out-of-pocket costs when you receive care, Plans G or N might be worth considering. If you're looking to minimize monthly premiums and don't mind paying more when you use services, Plans K or L could be appropriate.
Remember to compare premiums from multiple insurance companies, as prices can vary significantly for the same plan letter. Also consider the company's reputation, financial stability, and customer service ratings.
Navigating Medicare Supplement options can feel overwhelming, but you don't have to do it alone. Every person's situation is unique, and what works for your neighbor might not be the best choice for you.
The licensed advisors at New Jersey Medicare Advisory are here to help you understand your options and find a plan that fits your needs and budget. We'll answer your questions, compare plans from multiple carriers, and guide you through the enrollment process—at no cost to you.
Call us today at 856-221-7051 to schedule a no-obligation consultation and take the first step toward securing the Medicare coverage you deserve.