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HomeMedicare SupplementGeorgiaAlpharettaTurning 65 in Alpharetta? Your Medigap clock starts now

Medicare Supplement

Turning 65 in Alpharetta? Your Medigap clock starts now

Turning 65 in Alpharetta is a milestone — and for anyone thinking about a Medigap policy, it also starts a clock. The day your Medicare Part B coverage begins, so does a six-month window that federal law reserves just for you. Miss it, and the rules for buying a Medigap plan change in ways many people don't see coming.

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Calendar autumn desk in Alpharetta — illustrating this Medicare guide
Photo: Debby Hudson Photo by Debby Hudson on Unsplash

Key takeaways

  • Your six-month Medigap Open Enrollment Period begins the first month you are both 65 or older and enrolled in Part B, and it cannot be repeated.
  • During this window, insurers must sell you any Medigap policy they offer at their best available rate, regardless of your health history.
  • After the window closes, insurers in Georgia can generally use medical underwriting to charge more, exclude conditions, or deny coverage altogether.
  • Medigap works only with Original Medicare — you cannot use a Medigap policy alongside a Medicare Advantage plan.

Here's what Fulton County residents should understand before that window closes.

What the six-month window actually is

The Medigap Open Enrollment Period is a one-time, federally protected six months. It starts the first month you are 65 or older and enrolled in Medicare Part B. If your Part B begins July 1, your window runs July through December.

During those six months, you have what's called a "guaranteed issue right." Any insurer licensed to sell Medigap in Georgia must:

This is the only stretch of time when every Medigap door is guaranteed to be open.

Why this window is different from everything else

Medicare has several enrollment periods — the Annual Enrollment Period from October 15 to December 7, the Medicare Advantage Open Enrollment Period from January 1 to March 31, and various special enrollment events. Those windows apply to Medicare Advantage and Part D drug plans.

Medigap is different. It's regulated mostly at the state level and, outside of a handful of narrow guaranteed-issue situations, insurers are not required to accept you at all after your one-time window closes.

That's the piece many Alpharetta readers say catches them off guard: there's no annual "do-over" for Medigap the way there is for Advantage or Part D.

What changes after the six months end

Once your window closes, Georgia insurers can generally use medical underwriting when you apply for a Medigap plan. That means they can look at your health history and:

There are limited exceptions — for example, certain guaranteed-issue rights kick in if an employer plan ends or a Medicare Advantage plan leaves your area. But these are narrow, time-sensitive, and not a substitute for using your original six-month window.

How this fits with the rest of Medicare in Fulton County

Alpharetta is in Fulton County, where residents have a full menu of Medicare choices: Original Medicare (Parts A and B), Medicare Advantage plans (Part C), stand-alone Part D drug plans, and Medigap policies that pair with Original Medicare.

A few 2026 program-level facts worth knowing as you plan:

Remember: you cannot combine Medigap with a Medicare Advantage plan. Choosing between those two paths is a separate decision, and it's worth thinking through before your Medigap window opens.

Practical steps before the clock runs out

By the numbers

Medicare Part B premium, 2006–2026

The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.

$0$50$100$150$200200820122016202020242026

Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.

By the numbers

How people get Medicare in Fulton County

55% are on Medicare Advantage
(MA penetration in Fulton County)
55%
45%
Medicare Advantage Medicare Supplement (Medigap) Original Medicare only
U.S. average

MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.

Key dates

Medicare enrollment periods at a glance

  • Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
  • October 15 – December 7Annual Enrollment PeriodAnyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
  • January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
  • January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
  • VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.

Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.

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The parts of Medicare

Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Most people pay no premium for Part A.

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When can you enroll? An interactive year

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October 15 – December 7 — anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes take effect January 1.

Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.

Good to know

Frequently asked questions

Does the Medigap Open Enrollment Period ever repeat?
No. It's a one-time, six-month window tied to the start of your Part B coverage at age 65 or later. Once it ends, you generally lose the automatic right to buy any Medigap policy without medical underwriting, except in a few limited guaranteed-issue situations.
What if I'm under 65 and on Medicare because of a disability?
Federal law does not require insurers to offer Medigap to people under 65, though some states add their own protections. Georgia's rules are limited on this point, so it's worth calling Georgia's SHIP program (GeorgiaCares) or 1-800-MEDICARE to ask about current options in your situation.
Can I switch from Medicare Advantage to Medigap later?
You can try, but outside of specific guaranteed-issue situations, the insurer can use medical underwriting and may charge more or decline your application. This is why the initial six-month window matters so much — it's the one time that door is guaranteed open.
Where can I get unbiased help in Alpharetta?
Start with Medicare.gov, call 1-800-MEDICARE (available 24/7), or reach GeorgiaCares, Georgia's State Health Insurance Assistance Program (SHIP), for free one-on-one counseling. They don't sell plans and can walk you through your specific timeline. ## Before you decide If your 65th birthday is approaching, mark the month your Part B starts on a calendar and count forward six months. That's your window. For personalized help understanding how Medigap, Medicare Advantage, and Part D fit together in Fulton County, visit [medicare.gov](https://www.medicare.gov), call 1-800-MEDICARE, or contact GeorgiaCares for free, unbiased counseling.
Sources & further reading
  • CMS — Medicare Supplement Insurance (Medigap) rules (medicare.gov)
  • CMS — Medicare enrollment periods (medicare.gov)

For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.

Also for Alpharetta

Content Integrity Standards

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This page was last updated: September 2026.

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