Your windows to buy without health questions
| Window | Who it's for | Timing |
|---|---|---|
| Medigap open enrollment period | Age 65 or older with Part B | Six months starting the first month you're both 65 and enrolled in Part B |
| Oklahoma under-65 open enrollment | On Medicare because of a disability | Six months starting the month you first enroll in Part B |
| Federal guaranteed-issue rights | People losing certain coverage, such as a Medicare Advantage plan that's ending | Generally from 60 days before to 63 days after the coverage ends |
| Oklahoma birthday rule | Current Medigap policyholders (no gap over 90 days) | 60 days starting on your birthday, every year |
Your six-month open enrollment period
Oklahoma's rule (OAC 365:10-5-129(a)) says a company can't deny you, delay your coverage or charge more because of your health if you apply before or during the six months that begin with the first month you're both 65 and enrolled in Part B. Every Medigap plan the company sells must be available to you. If you had at least six months of earlier health coverage, the company also can't make you wait for coverage of a preexisting condition.
If you're still working and delay Part B, your Medigap window doesn't start until you sign up for Part B. See working past 65.
Guaranteed-issue rights
Federal law gives you the right to buy certain Medigap plans without health questions when, for example:
- Your Medicare Advantage plan leaves Medicare or stops serving your county, or you move out of its area.
- You joined Medicare Advantage for the first time within the past 12 months and want to return to Original Medicare (the trial right).
- Your Medigap company goes bankrupt or misled you.
This matters in Oklahoma for 2027, when some plans aren't renewing. See my plan is ending in 2027.
Oklahoma's extra protections
Oklahoma goes beyond federal law in two ways. Its birthday rule lets current policyholders switch each year to equal or lesser benefits. Its under-65 rule requires companies to offer at least one plan to people on Medicare because of a disability.
Steps to buy
- Find your window. Note the date your Part B starts, or the date your other coverage ends.
- Choose a plan letter. Benefits are standardized, so compare prices for the same letter.
- Apply in writing. Keep proof of your window, such as your Part B card or a plan's termination letter.
To compare Medigap policies from the companies they work with, you can request a call from a licensed insurance agent. See Medigap in Oklahoma.
Sources
- Oklahoma Insurance Department — OAC 365 Chapter 10 rule text (365:10-5-129, open enrollment)
- Oklahoma Insurance Department — Bulletin No. 10-2023 (Revised)
- Medicare.gov — When can I buy a Medigap policy?
- Medicare.gov — Choosing a Medigap Policy
More questions in this guide
- Can I change my Medicare supplement plan in Oklahoma?
- Can I get a Medicare supplement under 65 in Oklahoma?
- Can I switch from Medicare Advantage to a Medicare supplement in Oklahoma?
- Does Oklahoma have a Medigap birthday rule?
Part of the guide: Medigap (Medicare Supplement) in Oklahoma · All questions
Frequently asked questions
What happens if I apply outside these windows?
The company can ask health questions. Based on the answers, it can turn you down or charge you more. Medicare.gov says there's no federal guarantee a company will sell you a policy outside your open enrollment period or a guaranteed-issue situation.
Can I buy Medigap while I'm in a Medicare Advantage plan?
No, not to use alongside it. It's illegal for anyone to sell you a Medigap policy while you're in Medicare Advantage unless you're switching back to Original Medicare.
What if Social Security backdates my Medicare?
Oklahoma's rule says that if Social Security backdates your Medicare enrollment date, your six-month window is counted from the date you're first notified that your Medicare coverage was approved (OAC 365:10-5-129(e)).
Medicare in your Oklahoma county
Plans, local agents and help, county by county: Oklahoma · Tulsa · Cleveland · Canadian · Comanche · Rogers · Wagoner · Payne · Pottawatomie · Creek · Muskogee · Garfield · Grady · Washington · Logan · Bryan · Le Flore · Carter · Cherokee · McClain · All 77 counties →
