Medicare 2026

Still Working at 65? How Medicare Fits With Job Coverage

Turning 65 in Laguna Niguel while still clocking in at work? You're far from alone — and the decision about whether to sign up for Medicare right away, delay it, or layer it on top of your employer plan is one of the most common sources of confusion (and costly mistakes) at this age.

The rules aren't always intuitive, and they depend on details like the size of your employer, whether your coverage counts as "creditable," and how Social Security fits in. Here's a plain-English guide to help you avoid the traps.

Who pays first: it depends on employer size

Medicare uses "coordination of benefits" rules to decide which insurance pays first when you have both. The tipping point is the number of employees at the company providing your coverage.

If your employer (or your spouse's employer, if you're covered through them) has 20 or more employees, the group health plan is the primary payer and Medicare is secondary. In that case, many people delay Part B to avoid paying a premium for coverage they don't yet need.

If the employer has fewer than 20 employees, Medicare is usually primary. That's a big deal — because if you don't enroll in Medicare on time, the employer plan may only pay the small share it would have paid as secondary, leaving you with big bills.

Laguna Niguel is in Orange County, where many residents work for small businesses or are self-employed, so this size rule catches a lot of people off guard. Ask your HR department or benefits administrator directly which category you fall into.

Should you take Part A at 65?

For most people, yes. Part A (hospital insurance) is premium-free if you or your spouse paid Medicare taxes for at least 10 years. Signing up doesn't cost anything out of pocket, and it can help cover hospital costs the employer plan doesn't.

The one big exception: if you contribute to a Health Savings Account (HSA). Once you enroll in any part of Medicare — including premium-free Part A — you can no longer make new HSA contributions. If your HSA is important to you, talk with your benefits team before enrolling and consider timing carefully.

Delaying Part B without a penalty

Part B (outpatient and doctor coverage) carries a monthly premium, so many people with strong employer coverage choose to delay it. The key is that you must have coverage from current employment — retiree coverage and COBRA do not count as active employer coverage for this purpose.

When your job or employer coverage ends, Medicare gives you a Special Enrollment Period (SEP) of 8 months to sign up for Part B without a late penalty. Wait longer, and you could face a Part B late enrollment penalty that lasts for as long as you have Medicare.

You'll also need to submit two forms — CMS-40B and CMS-L564 (the employer verification form) — to prove you had qualifying coverage.

What about Part D drug coverage?

If your employer plan includes prescription drug coverage that Medicare considers "creditable" (meaning it's at least as good as a standard Medicare Part D plan), you can delay Part D without a penalty. Your plan should send you a notice each year telling you whether it's creditable — keep those notices.

For 2027, Medicare Part D includes some meaningful updates worth knowing about, even if you're not enrolling yet:

• The out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027.
• The maximum deductible is $615 in 2026 and $700 in 2027.
• The old coverage gap or "donut hole" has been eliminated as of 2025.
• A new Medicare Prescription Payment Plan lets people spread drug costs across the year in monthly installments.

If you eventually leave employer coverage, you'll have a Special Enrollment Period to pick up Part D, too.

Watch out for IRMAA and Social Security timing

Higher earners pay more for Part B and Part D through an income-related surcharge called IRMAA. In 2026, IRMAA kicks in above $109,000 in income for a single filer (higher thresholds apply for married couples filing jointly). It's based on your tax return from two years ago, so if you're still working at a strong salary, plan for it.

Also: if you've already started collecting Social Security, you'll be automatically enrolled in Part A and Part B when you turn 65. If you want to delay Part B because of employer coverage, you'll need to actively decline it — don't just ignore the card that shows up in the mail.

Where to get personalized help

Because these decisions turn on your specific situation — employer size, HSA use, spouse's coverage, income — this is a good time to get one-on-one guidance from a neutral source.

• Medicare.gov — the official site for rules, enrollment, and plan comparisons.
• 1-800-MEDICARE (1-800-633-4227) — available 24/7.
• California's SHIP program (HICAP) — free, unbiased Medicare counseling for California residents, including Laguna Niguel.
• Your employer's HR or benefits office — they can confirm employer size, whether your drug coverage is creditable, and how retiree benefits would coordinate with Medicare.