Medicare Supplement

Medigap Lettered Plans Explained for Kaneohe Medicare

If you live in Kaneohe and you're sorting through Medicare options, you've probably run into a wall of letters — Plan A, Plan G, Plan N, and more. These letters belong to Medicare Supplement Insurance, better known as Medigap. And once you understand how the lettering system works, the whole thing gets a lot less confusing.

Kaneohe Readers: Here's What Medigap Actually Does

Medigap is sold by private insurance companies, but the benefits inside each lettered plan are standardized by federal law. That means a Plan G from one company covers the same core gaps as a Plan G from another. The price and customer service can differ. The core benefits cannot.

What Medigap Is Designed to Do

Medigap works alongside Original Medicare (Part A and Part B). It doesn't replace them. Instead, it helps pay some of the out-of-pocket costs Original Medicare leaves behind — things like coinsurance, copayments, and in some cases the Part A deductible.

A few important points to keep straight:

• Medigap only works with Original Medicare. It does not work with Medicare Advantage.
• Medigap does not include prescription drug coverage. For that, you'd add a stand-alone Part D plan.
• You pay a monthly premium for Medigap on top of your Part B premium.

For the official rundown, Medicare.gov's Medigap basics page is the source to trust.

How the Standardized Letters Work

In most states, including Hawaii, Medigap policies are sold using standardized letters: A, B, C, D, F, G, K, L, M, and N. Each letter is a fixed benefit package set by federal rules.

Here's the key idea: the letter tells you what's covered. The company tells you what you'll pay.

Two more things worth knowing:

• Plans C and F are only available to people who became eligible for Medicare before January 1, 2020. If you turned 65 after that date, those two letters are off the table for you.
• Plans K and L have out-of-pocket limits but cover a smaller share of costs until you hit that limit.
• Plan N typically has lower premiums but may charge small copays for some office and ER visits.

Because benefits are standardized, comparing Medigap plans is really a comparison of price, company reputation, and customer service — not benefit lists.

Kaneohe Is in Honolulu County — Here's Why That Matters

Kaneohe sits in Honolulu County, where Medigap options follow the same federal standardization rules that apply across most of the country. The availability of specific carriers can vary by ZIP code, but the lettered benefits do not change from one company to the next.

If you're comparing local options, Medicare's Plan Finder at Medicare.gov lets you enter your ZIP and see which companies are selling Medigap policies in your area.

The Enrollment Window That Trips People Up

This is the mistake we see most often: waiting too long.

Your Medigap Open Enrollment Period is a one-time, six-month window that starts the month you're 65 or older and enrolled in Part B. During this window, insurance companies must sell you any Medigap policy they offer at their best available rate, regardless of your health history.

After that window closes, companies in most states can use medical underwriting. That means they can charge you more — or turn you down — based on your health. Hawaii follows the federal baseline here, so protecting that first six-month window really matters.

Note: this Medigap window is different from the Medicare Annual Enrollment Period (Oct. 15 – Dec. 7), which is for Part D and Medicare Advantage.

Medigap vs. Medicare Advantage — A Quick Reality Check

People sometimes assume Medigap and Medicare Advantage are two versions of the same thing. They aren't.

• Medicare Advantage (Part C) replaces Original Medicare with a private plan that usually bundles hospital, medical, and often drug coverage, with its own network and rules.
• Medigap works only with Original Medicare and helps pay costs Medicare doesn't cover.

You cannot use both at the same time. Choosing between them is one of the bigger decisions you'll make in Medicare, and it's worth taking your time.