Medicare Supplement

Before You Shop Medigap in Mesa for 2027: Key Facts

MESA, Ariz. — As 2027 planning season gets underway, Medigap shoppers in Mesa are asking the same practical questions: which plan letters can I still buy, what happens when the Part B deductible resets in January, and how do I know if my premium is going up? Here is a plain-language look at what changes for Medigap in Maricopa County heading into the new year — and what stays exactly the same.

Medicare SupplementMesa, AZ

Which plan letters you can actually buy in 2027

The menu of standardized Medigap plans in Arizona is not changing for 2027. If you are newly eligible for Medicare, the letters open to you are A, B, D, G, high-deductible G, K, L, M and N.

Plans C and F remain closed to anyone who became eligible for Medicare on or after January 1, 2020. If you were eligible before that date, you can still keep a Plan C or F you already have, or apply for one, but most Mesa shoppers turning 65 today will be choosing among the other letters — most often G, high-deductible G, or N.

Each letter is standardized by federal rule, which means a Plan G is the same set of benefits no matter which company sells it. What differs between insurers is the price and the customer service, not the coverage.

The Part B deductible reset — why it matters for Plans G and N

Plans G and N are designed around one moving part: the Part B deductible. You pay that deductible out of pocket each calendar year, and after that your Medigap plan picks up its share of Part B costs.

On January 1, that deductible resets to zero and starts over. CMS sets the new amount for the year, and it is the same everywhere in the country — Mesa is no different from Flagstaff or Phoenix on this. If you are on Plan G or N, expect to meet that fresh deductible early in the year before your plan begins paying its Part B share again.

The high-deductible version of Plan G works the same way but with a much larger yearly out-of-pocket amount before coverage kicks in — a trade-off for a lower monthly premium.

Rate-adjustment season: how to check your premium

Fall and winter are when many Medigap insurers file new rates with the Arizona Department of Insurance and Financial Institutions. Unlike Medicare Advantage and Part D, Medigap does not have a single national "renewal date" — each insurer sets its own schedule, and your renewal letter will tell you when a change takes effect.

If your premium is going up, here is what to do before you accept it:

• Compare the same plan letter at other insurers on Medicare.gov's Medigap policy search by Mesa ZIP code. Because benefits are standardized, a Plan G is a Plan G.
• Check the Arizona insurance department's Medigap rate guide for a side-by-side view.
• Remember that switching Medigap plans outside your one-time Open Enrollment Period can involve medical underwriting in Arizona, so ask about your rights before you cancel anything.

Insurers entering or leaving Arizona

Mesa is in Maricopa County, where a mix of national and regional insurers offer Medigap coverage. Companies do occasionally enter or leave the Arizona market, or stop selling certain plan letters to new applicants.

Because no single public list tracks these moves in real time, the most reliable way to see who is selling in your ZIP code right now is the Medigap policy search on Medicare.gov. Arizona's State Health Insurance Assistance Program (SHIP) can also walk you through who is currently accepting new applicants in Mesa.

What is not changing

A few things worth remembering, because they cause a lot of confusion:

• Medigap has no Annual Enrollment Period. You can apply any time of year — but outside your one-time Medigap Open Enrollment window (the six months starting when you are 65 and enrolled in Part B), insurers in Arizona can use medical underwriting.
• The October 15 – December 7 Annual Enrollment Period is for Medicare Advantage and Part D, not Medigap.
• Medigap does not include prescription drug coverage. If you want drug coverage, you pair Medigap with a standalone Part D plan.