Speak with an experienced advisor! 405-256-4669Every year, starting on your birthday, Oklahoma gives you 60 days to switch your Medicare Supplement (Medigap) plan to one with the same or fewer benefits, from any insurance company, without answering health questions.
If you’ve had the same Medigap plan for a few years, your premium has probably gone up. This rule gives you a guaranteed chance to shop around once a year. Here’s how it works, and how to use it without making a costly mistake.
The birthday rule at a glance
| When | 60 days, starting on your birthday, every year |
|---|---|
| Who | Oklahomans with a Medicare Supplement policy now and no gap in Medigap coverage longer than 90 days |
| What | A plan with equal or lesser benefits |
| From | Your current insurance company or a different one |
| Health questions | None |
Why the birthday rule matters
You can apply to switch Medigap plans any time of year. But outside of your first Medigap enrollment, switching usually means answering health questions, and a health condition can get your application turned down. That kept many people stuck paying higher premiums year after year.
Since September 1, 2023, Oklahoma has given every Medigap policyholder a guaranteed opportunity each year. During your birthday window, an insurance company can’t turn you down or charge you more because of your health, as long as you choose a plan with the same or fewer benefits.
Who can use it
You can use the birthday rule if:
- You live in Oklahoma and have a Medicare Supplement (Medigap) policy now.
- You haven’t had a gap in Medigap coverage longer than 90 days since you first enrolled.
- You’re switching to a plan with the same or fewer benefits.
It doesn’t apply if:
- You have a Medicare Advantage plan. Moving from Advantage to Medigap usually requires health questions.
- You want a plan with more benefits than you have now, such as moving from Plan N to Plan G.
- Your Medigap coverage lapsed for more than 90 days.
What you can switch to
Medigap plans are standardized by letter, so a Plan G from one company covers the same things as a Plan G from another. The most common birthday rule moves look like this:
| If you have | You can switch to, with no health questions |
|---|---|
| Plan F | Plan F from another company, Plan G, or Plan N |
| Plan G | Plan G from another company, or Plan N |
| Plan N | Plan N from another company |
Other combinations may also qualify. Call me and I’ll tell you exactly which plans are open to you. Not sure whether Plan G or Plan N is right for you? See my Plan G vs. Plan N comparison.
An example: a June 11 birthday
Your window opens on your birthday and runs for 60 days. Most insurance companies let you apply a little early so your new plan can start right on your birthday.
| Date | What happens |
|---|---|
| Mid-May | Compare rates and apply. Applications can usually be sent up to 30 days before your birthday. |
| June 11 | Your window opens. This is the earliest date a birthday rule plan can take effect. |
| August 9 | Your window closes (day 60). After this, switching means health questions again until next year. |
How to switch without a gap in coverage
- Compare before your birthday. Look at today’s price, each company’s history of rate increases, and household discounts. The cheapest plan today isn’t always the cheapest in five years.
- Apply inside your window. Apply early so there’s time to fix any paperwork problems before your 60 days run out.
- Keep your current plan until you’re approved. Don’t cancel anything until the new policy is approved and you know its start date. Canceling first could leave you without coverage.
- Cancel the old policy at the right time. End the old policy so it stops the day the new one begins. Your new policy also comes with a 30-day free-look period to review it.
Is switching always worth it?
Not always. Sometimes the right answer is to keep the plan you have, and I’ll tell you if that’s the case. A few things to weigh:
- A lower price today is only a good deal if that company’s rates hold up over time.
- A household discount on your current plan can disappear if you switch and your spouse doesn’t.
- Moving from Plan G to Plan N saves on premiums but adds some copays. It fits some people and not others.
Common questions
Can I use the birthday rule every year?
Yes. The window opens every year on your birthday, as long as you still meet the requirements.
Do I have to wait until my birthday to change plans?
No. You can apply for a different Medicare Supplement any time of year; there’s no enrollment period for Medigap. Outside your birthday window, you’ll answer health questions, and each company sets its own rules, so some are more forgiving than others. Applying with health questions can also let you move to a plan with more benefits, which the birthday rule doesn’t allow. Either way, keep your current plan until your new one is approved.
Does the fall enrollment period apply to my Medigap plan?
No. The fall enrollment period (October 15 to December 7) is for Medicare Advantage and Part D drug plans. Medicare Supplement plans don’t have an enrollment period, so you can apply to change any time of year.
Do I have to change insurance companies?
No. You can move to a lower-cost plan with your current company or switch to a different company.
Does my Part B deductible start over?
No. Medicare tracks your Part B deductible for the calendar year, so switching supplements doesn’t reset it.
I’m on Medicare Advantage. Can I use it?
No, the birthday rule is only for current Medigap policyholders. Call me and I’ll explain the options that do apply to you.
What if I miss my window?
You can still switch any time of year by answering health questions. Since each company sets its own health rules, a company that turns you down isn’t the only option. And your birthday window comes around again every year.
Does a rate review cost anything?
No. There’s no charge and no obligation to switch.
Get your free birthday rate review
Tell me your birthday month and current plan, and about a month before your window opens, I’ll compare your rate against other companies and call you with what I find. If staying put is your best option, I’ll tell you that too.
Call me at 405-256-4669 or request a quote online. I’ll call you personally, and your information is never sold or shared.
Source: Oklahoma Insurance Department, Medicare Supplement Open Enrollment FAQs, and Oklahoma Administrative Code 365:10-5-129. This page is general information, not a guarantee of eligibility. Insurance company rules and rates vary. Last reviewed September 30, 2026.