Medicare 2026
How Medicare works alongside workplace insurance in Norman
NORMAN, Okla. — Turning 65 while you're still punching a clock? You're not alone, and the decision about whether to sign up for Medicare right away is one of the most common — and most confusing — questions Oklahomans ask as their birthday approaches.
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Key takeaways
- If your employer has fewer than 20 workers, Medicare usually pays first, so most people in that situation should enroll in Part A and Part B at 65.
- If your employer has 20 or more workers, your job coverage generally pays first and you can often delay Part B without a penalty — but only if the coverage counts as "creditable."
- You get an 8-month Special Enrollment Period to sign up for Part B after your job or employer coverage ends, whichever comes first.
- Health Savings Account (HSA) contributions must stop once you enroll in any part of Medicare, including Part A.
The short answer: it depends on the size of your employer, the kind of coverage you have, and whether you want to avoid a lifelong late penalty. Here's how to think it through.
Start with the size of your employer
The rules hinge on one detail most people don't think about: how many employees your company has.
According to Medicare.gov, if your employer has 20 or more employees, the group health plan generally pays first and Medicare pays second. In that case, you can usually delay Part B (and Part D) without a late penalty as long as you have coverage through current employment — yours or your spouse's.
If your employer has fewer than 20 employees, Medicare generally pays first. That means if you don't sign up for Part B at 65, your employer plan may pay very little, leaving you on the hook. Most people in this situation should enroll at 65.
Norman is in Cleveland County, where retirees and still-working seniors alike can compare plan options through the Medicare Plan Finder once they've sorted out timing.
Part A is usually a "yes" at 65
Part A (hospital coverage) is premium-free for most people who paid Medicare taxes long enough. Many workers enroll in Part A at 65 even if they keep employer coverage.
One big exception: if you contribute to a Health Savings Account (HSA), you'll need to stop HSA contributions before your Medicare start date. Enrolling in any part of Medicare — even just Part A — ends your ability to add to an HSA. You can still use the money already in it.
The penalty that lasts a lifetime
If you miss your window and don't have qualifying coverage, the Part B late enrollment penalty adds 10% to your monthly premium for each full 12-month period you could have had Part B but didn't. That penalty typically sticks with you for as long as you have Medicare.
Part D has its own late penalty if you go 63 days or more without "creditable" drug coverage after becoming eligible. Ask your employer's benefits office each year for a creditable coverage notice — it's your proof.
What "creditable coverage" means
Not every job-based plan protects you from penalties. Coverage is considered "creditable" if it's expected to pay, on average, at least as much as standard Medicare would. COBRA and retiree health plans, importantly, do not count as active employer coverage for the purpose of delaying Part B — even though they're insurance.
If you're unsure, call your HR or benefits administrator and ask directly, in writing if possible.
Your Special Enrollment Period
When your job coverage ends — whether you retire, get laid off, or your spouse's coverage ends — you have an 8-month Special Enrollment Period to sign up for Part B without a penalty. For Part D or a Medicare Advantage plan, the window is shorter: usually 2 months.
Don't wait until the last week. Gaps in coverage can happen if paperwork is slow.
A quick word on 2027 costs
Even if you delay Medicare, it's worth knowing where the program is headed. In 2027, Part D will have a $2,400 out-of-pocket cap on covered drugs and a maximum deductible of $700, according to CMS. The coverage gap (the old "donut hole") is gone as of 2025. And the Medicare Prescription Payment Plan lets you spread drug costs across the calendar year in monthly installments instead of paying big amounts at the pharmacy counter.
Higher earners should also know that IRMAA surcharges on Part B and Part D premiums begin above $109,000 in income for a single filer in 2026.
Where to get personal help
Medicare timing is personal. Two people at the same company can have different right answers depending on their spouse, their health, and their savings goals.
- Medicare.gov — the official source for enrollment rules and plan comparisons.
- 1-800-MEDICARE (1-800-633-4227) — 24/7 help from Medicare directly.
- Oklahoma SHIP (Senior Health Insurance Counseling Program) — free, unbiased one-on-one counseling for Oklahomans. Call 1-800-763-2828.
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.
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 Cleveland County
(MA penetration in Cleveland County)
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.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
Explore
The parts of Medicare
Good to know
Frequently asked questions
Do I have to sign up for Medicare at 65 if I'm still working?
Can I keep my HSA if I enroll in Medicare?
What happens to my Medicare timing if I go on COBRA?
When can I switch to a Medicare Advantage or Part D plan after retiring?
- CMS — Medicare basics (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Norman
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This page was last updated: September 29, 2026.