Medicare Late Enrollment Penalties: How Long Do They Last?

Missing a Medicare enrollment deadline can be an expensive mistake, and unfortunately, some Medicare penalties can follow you for years or even for life.

The good news? Not everyone who delays Medicare has to pay a penalty. Understanding the rules before you delay coverage can save you a lot of money and frustration.

The Medicare Part B Late Enrollment Penalty

If you don't enroll in Medicare Part B when you're first eligible and you don't have coverage that allows you to safely delay enrollment, you could face a late enrollment penalty.

The Part B penalty is generally:

10% for every full 12-month period you could have had Part B but didn't enroll.

For example:

• 1 full year late = 10% penalty

• 2 full years late = 20% penalty

• 3 full years late = 30% penalty

Here's the part that surprises people:

The Part B penalty generally lasts as long as you have Medicare Part B.

In other words, this usually isn't a one-time fine. It's an increase to your monthly Part B premium.

What About the Part D Penalty?

Medicare Part D has its own late enrollment penalty.

Generally, you can trigger a Part D penalty if you go 63 consecutive days or longer without Medicare Part D or other creditable prescription drug coverage after you're eligible.

The penalty is calculated using:

1% of the national base beneficiary premium × the number of uncovered months.

That amount is then added to your monthly Medicare drug plan premium.

And just like Part B, the Part D penalty generally continues for as long as you have Medicare prescription drug coverage.

But Having Other Insurance Can Make a BIG Difference

This is where Medicare gets tricky.

Turning 65 doesn't necessarily mean you must immediately enroll in every part of Medicare.

For example, someone who is still actively working and covered by their own or their spouse's employer group health plan may be able to delay Part B without a penalty and later use a Special Enrollment Period.

For Part D, you may also be able to delay enrollment if you maintain creditable prescription drug coverage. (Not every coverage is creditable)

The important thing is to make sure your particular coverage actually qualifies.

Don't assume that having "insurance" automatically protects you from Medicare penalties.

COBRA, retiree coverage and other types of insurance can have very different Medicare rules.

One Important Exception for People Under 65

There's also some good news for people who became eligible for Medicare before age 65 because of a disability.

Late enrollment penalties accumulated before 65 generally reset when you turn 65 and receive a new Medicare Initial Enrollment Period.

Keep Your Creditable Coverage Letters!

If you have employer or other prescription coverage, you may receive a notice telling you whether your prescription coverage is considered creditable for Medicare Part D.

Keep it!

That seemingly unimportant piece of paper can become extremely important if you're later asked to prove that you maintained creditable prescription coverage.

The Bottom Line

Medicare enrollment mistakes can be costly.

The biggest mistake is assuming:

"I already have health insurance, so I don't need to worry about Medicare yet."

Sometimes that's absolutely correct.

Other times, it can lead to coverage gaps and penalties that may last for years or even for life.

Before delaying Medicare, make sure you understand exactly how your current insurance works with Medicare.

Medicare Melanie helps people understand their options before a Medicare decision turns into an expensive mistake.

Have Medicare questions?

Medicare Melanie is here to help.

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