Medicare Supplement

Kingman at 65: the one Medigap window that never comes back the same way

KINGMAN, Ariz. — If you are approaching 65 in Mohave County, there is one date on the Medicare calendar that quietly shapes your Medigap choices for the rest of your life. It is not the fall Annual Enrollment Period most people have heard about. It is the six-month Medigap Open Enrollment Period that starts the month your Medicare Part B coverage begins.

During those six months, you have the strongest rights you will ever have to buy a Medicare Supplement (Medigap) policy. After the window closes, the rules change — and for many people, they change permanently.

What the six-month Medigap window actually is

Medigap is private insurance that helps pay some of the out-of-pocket costs Original Medicare (Part A and Part B) leaves behind, like coinsurance and deductibles. It only works alongside Original Medicare, not with a Medicare Advantage plan.

Your Medigap Open Enrollment Period begins on the first day of the month you are both 65 or older and enrolled in Part B. It lasts six months. According to CMS, this is the one stretch of time when you have a federal guaranteed issue right to buy any Medigap policy sold in your state, from any company that sells one there.

That means during this window:

• An insurer cannot turn you down for a Medigap policy because of past or current health problems.
• An insurer cannot charge you a higher premium because of your health.
• An insurer cannot make you wait for coverage of a pre-existing condition if you had at least six months of prior creditable coverage.

Why this window matters more than the fall enrollment period

A lot of people in Kingman hear the ads every October about the Annual Enrollment Period (Oct. 15 – Dec. 7) and assume that is when Medigap decisions get made. It is not.

The fall window is for Medicare Advantage and Part D drug plans. Medigap is on its own schedule, and for most people that schedule runs exactly once: the six months tied to your 65th birthday and Part B start date.

Miss it, and outside of a few narrow guaranteed issue situations set by federal or Arizona law, insurers can look at your health history when you apply later. They may charge you more, add waiting periods, or decline to sell you a policy at all.

What changes after the six months end

After your Medigap Open Enrollment Period closes, three things generally shift:

1. Medical underwriting returns. Insurers can ask health questions and use the answers to decide whether to offer you a policy and at what price. 2. Switching gets harder. If you already have a Medigap policy and want to change to a different one later, you usually have to go through underwriting again. 3. Guaranteed issue becomes the exception, not the rule. There are still specific situations — like losing other coverage involuntarily — where you get a limited right to buy certain Medigap plans without underwriting. But those are narrower than the six-month window.

This is why Medicare counselors so often tell people: the decision you make (or do not make) in those six months can follow you for decades.

How to use the window well in Kingman

Kingman is in Mohave County, where residents choosing Original Medicare plus Medigap typically also enroll in a stand-alone Part D drug plan to cover prescriptions. A few practical steps can help:

• Confirm your Part B start date. That date sets when your six-month clock begins. You can find it on your red, white and blue Medicare card or in your medicare.gov account.
• Compare the standardized Medigap plan letters. In Arizona, as in most states, Medigap plans are standardized (Plan A, Plan G, Plan N, and so on). The benefits inside each letter are the same from company to company; premiums and customer service can differ.
• Ask about how the insurer prices premiums. Some use community rating, some use issue-age, and some use attained-age. Each affects how your premium may change as you get older.
• Think about drug coverage separately. Medigap policies sold today do not include prescription drugs, so you will likely want a stand-alone Part D plan. For 2026, Part D has a $2,100 out-of-pocket cap and a maximum deductible of $615.

Where to get unbiased help

You do not have to figure this out alone, and you do not have to rely only on advertising. Free, one-on-one help is available:

• Medicare.gov has a Medigap policy search tool that shows which plans are sold in your ZIP code.
• 1-800-MEDICARE (1-800-633-4227) is staffed 24/7.
• Arizona SHIP (State Health Insurance Assistance Program) offers free counseling to Kingman residents. Counselors do not sell insurance and do not work on commission.