Can I appeal a Medicare late enrollment penalty?

I've seen this one a lot. Employer HR says "you're covered, don't bother with Part B" and the beneficiary believes them. Years later, retirement comes, the GHP ends, and SSA hits a 10%-per-year permanent surcharge.

If the employer's information traced back to a federal source — SSA, CMS, or anyone authorized to act on behalf of the federal government — POMS HI 00805.170 says you may have grounds for equitable relief. The note in section D is explicit: misinformation passed through an employer or insurance company that originated with a federal employee or agent qualifies.

The Beneficiary Enrollment Notification and Eligibility Simplification Act — Public Law 116-260, signed December 27, 2020 — created new Part B SEPs effective January 1, 2023. CMS designates the qualifying "exceptional conditions" by regulation.

The headline conditions: misinformation about needing Medicare, loss of Marketplace coverage, formerly incarcerated individuals, formerly homeless individuals, and others CMS may add. The SEP window is generally 6 months from the triggering event. Part B coverage starts the month after enrollment under the new rules — not delayed to the following calendar block as the old rules required.

Under 42 CFR 423.56(g), if you weren't adequately informed that your prior prescription drug coverage was not creditable, you can apply to CMS to have it treated as creditable for late penalty purposes. This is a different appeal than equitable relief and a different appeal than the BENES SEP.

VA coverage, TRICARE, FEHB, employer GHP, Medigap drug riders, Indian Health Service, and certain individual plans are all listed in 42 CFR 423.56(b) as creditable categories. If your prior coverage was on that list and you got a non-creditable disclosure that said otherwise, you have grounds.

If you qualify for Extra Help — also called the Low-Income Subsidy — the Part D late enrollment penalty is eliminated entirely. Not reduced. Eliminated. This is one of the most under-known facts in Medicare.

If you have a Part D LEP today and you qualify for Extra Help going forward, the LEP comes off your premium. Apply through SSA online, by phone, or at your local field office. The application is short and the asset and income tests are more generous than people expect.

If this isn't you, see the equitable relief or BENES SEP paths above. → See Extra Help (LIS)

Loss of Marketplace coverage is one of the BENES Act exceptional-conditions SEP categories. If you were on a healthcare.gov plan, lost it because you became Medicare-eligible, and missed the Part B window because nobody at the Marketplace told you Medicare was your only path, the SEP applies.

The SEP window is generally 6 months from the loss. Part B coverage begins the month after enrollment — a substantive improvement over the pre-2023 rules.

When equitable relief is granted under POMS HI 00805.170, SSA can adjust premium liability — the policy explicitly lists "appropriate adjustment of premium liability" as one of the authorized actions. Practical effect: past LEP amounts you paid are refunded.

For Part D, if a 42 CFR 423.56(g) reconsideration succeeds and CMS treats your prior coverage as creditable, the LEP comes off your bill going forward and the past amounts are refunded by the plan. Tax-time impact: the SSA-1099 reflects the corrected Part B premium amount once the equitable relief decision is recorded.

Helping a parent or family member fight an LEP is one of the most common reasons people land on this page. The good news: equitable relief and BENES Act SEPs can be filed on someone's behalf with proper authorization (form SSA-1696 for representative status).

What to bring on day one: their Medicare number; the original LEP notice; the date they were first eligible for Part B or Part D; documentation of any prior creditable coverage (employer GHP, FEHB, VA, TRICARE, Medigap drug rider); and any letter, email, or note from an employer's HR, SSA, CMS, or a plan that may have steered them wrong. Equitable relief is paper-driven — the more documentation on day one, the faster SSA can act.

If your situation doesn't match equitable relief grounds, the BENES Act SEP categories, or the creditable-coverage exception, the penalty may genuinely be permanent. But before accepting that, do two things.

First, call your State Health Insurance Assistance Program at 1-877-839-2675. SHIP counselors see hundreds of LEP cases and can spot facts that look ordinary but actually map to a recognized appeal ground. Second, re-read the LEP notice itself — sometimes the cause of the penalty is misstated and the right appeal is hiding in the difference between what SSA's records say happened and what actually happened.