Medicare Denied Your Claim? A Step-by-Step Guide to Appealing

A denial is a draft, not a verdict

The letter arrives looking like the last word. It uses words like "not covered" and "not medically necessary," and for most people the instinct is to assume the decision is settled and reach for the checkbook. That instinct is almost always wrong. A Medicare denial is the first answer, not the final one, and the program is built — by law — to let you ask again.

What most retirees never hear is how often asking again works. In the Medicare Advantage and Part D world, government audits have found that roughly three out of four denials that get appealed are overturned at the first two levels. Let that sink in: the majority of people who push back win. That figure is not a loophole. It tells us something uncomfortable but useful — a great many denials are issued in error, on the assumption that the patient will simply accept them.

This briefing walks through the five levels of appeal, explains the deadlines that matter most, and shows you exactly what to do with the letter sitting in front of you.

The five levels, in plain language

Medicare's appeals process has five steps, each with an intimidating name and a simple purpose. You almost never need to climb all five — most claims resolve in the first one or two.

Level one — Redetermination (Original Medicare) or Reconsideration (Advantage/Part D). This is your first formal "please look again." With Original Medicare you ask the contractor that processed the claim; with an Advantage or drug plan you ask the plan itself. It is free, requires no representative, and is where the large majority of successful appeals end.

Level two — Reconsideration by an independent reviewer. If level one fails, an outside entity that did not make the original decision takes a fresh look. The independence matters; this is a genuine second opinion, not the same people defending their first call.

Level three — Administrative Law Judge (ALJ) hearing. A judge reviews your case, usually by phone or video. This level generally requires the disputed amount to clear a minimum dollar threshold, and it is where having documentation pays off.

Level four — Medicare Appeals Council review. A panel reviews the judge's decision.

Level five — Federal District Court. The final stop, reserved for high-value disputes and rare cases. Almost no ordinary claim travels this far.

The takeaway is reassuring: the levels exist to give you escalating, independent reviews, but the data says you'll most likely never need to leave the bottom of the ladder.

The deadline is the whole game

If you remember one thing from this briefing, make it this: appeals are won or lost on the calendar. Every denial notice prints a filing deadline, and missing it usually forfeits your right to appeal that claim. The windows differ by program — Original Medicare typically gives you 120 days from the date on your Medicare Summary Notice for a redetermination, while Advantage and Part D plans run on tighter cycles, often 60 days.

There is also a fast lane most people don't know about. If waiting for a standard decision could seriously harm your health, you or your doctor can request an expedited appeal, and the plan must answer drug and care denials within as little as 72 hours. Use it when the stakes are genuinely time-sensitive.

The safest habit is to file as soon as you've decided to, and to file in a way that proves the date — through the plan's portal with a confirmation number, or by certified mail with a return receipt. Once you have filed on time, the plan is legally obligated to reconsider. The burden shifts back to them.

What actually makes an appeal succeed

Appeals win for unglamorous reasons. A startling share of denials are administrative — a wrong diagnosis code keyed in by a billing office, a missing prior-authorization that was actually obtained, a service flagged as duplicate that wasn't. When you read the denial reason carefully and match it against your records, the error often jumps off the page.

The single most powerful attachment you can add is a short letter from your treating physician explaining why the service was medically necessary. Reviewers respond to clinical reasoning from the person who actually examined you. It does not need to be long; two or three specific sentences tying your diagnosis to the treatment usually outweigh a generic denial template.

Build a simple file: a copy of the denial notice, the relevant pages of your medical records, the doctor's note, and a one-page cover letter stating plainly what you want approved and why. Keep copies of everything you send. Organized beats eloquent every time.

You don't have to do this alone

The appeals process is designed to be navigated without a lawyer, especially at the first two levels, and free help is genuinely available. Every state runs a State Health Insurance Assistance Program (SHIP) staffed by trained counselors who will sit down with your actual paperwork at no cost. The Medicare Rights Center and the 1-800-MEDICARE line can also walk you through the steps. For higher-level appeals involving large sums, that's when paid advocates or attorneys can earn their fee — but most retirees never reach that point.

So here is the calm, practical plan. Read the denial letter today, not next week. Find the deadline and write it on the calendar. Identify the stated reason and check it against your records for the error that's often hiding there. Ask your doctor for a brief note. File on time, with proof of the date. Then wait for the reconsidered answer — which, far more often than the system would like you to expect, comes back in your favor.