Prior authorization denied: what to do next

Benefily Team20 July 20269 min read

A worried senior couple reviewing a prior authorization denial letter together at their kitchen table

A letter has arrived saying your prior authorization request was refused, and it's landed at the worst possible moment: you're waiting on a medicine, not paperwork. Here's the reassuring part. A denial is a starting point, not a verdict. This guide sets out exactly what to check first, the full appeal ladder with Medicare's own deadlines at each rung, and a worked example showing how a real-shaped denial gets overturned. It draws on the current federal rules governing Part D appeals and the newest published data on how often appeals actually succeed, so you can act on facts rather than dread.

Key takeaways

A denial notice must state the specific reason and how to appeal; check first whether it's a clinical refusal or a missing-paperwork issue, because the fix for each is different.
The first appeal, a redetermination, must be requested within 60 days of the denial notice. The plan then has 7 calendar days to decide, or 72 hours if it's expedited.
If the plan upholds its own denial, an Independent Review Entity looks at the case next, on the same deadlines.
Larger claims can continue to an Administrative Law Judge, then a Medicare Appeals Council, then federal court, each with its own filing window and, for the last two, a minimum dollar amount at stake.
Most people who are denied never appeal, yet the outcomes for those who do are strongly in their favour.
A plan that misses its own deadline has, in effect, denied you again. That counts as grounds to appeal immediately rather than a reason to keep waiting.

Read the denial letter properly

Before anything else, the notice itself is worth a careful read rather than a glance. A valid Part D denial has to set out the specific reason for the refusal, tied to the plan's own coverage criteria for that drug, plus a clear explanation of your appeal rights and exactly where to send one. It should also carry the date that starts your 60-day clock. If any of that is genuinely missing, note it; a defective notice is itself grounds worth raising with your appeal. Usually, though, the substance is there. The task is to work out what it actually says.

That's where the first real decision sits. A denial almost always falls into one of two categories, and they call for completely different responses. A clinical denial means the plan looked at your case and concluded you don't meet its medical criteria for that drug: perhaps it wants proof you tried a cheaper alternative first, or a lab value above a certain threshold. A missing-information denial means the paperwork submitted on your behalf simply didn't show something that's actually true about your case, such as a prior treatment you did try, just not documented in the fax your prescriber sent. The first needs new clinical argument. The second often needs nothing more than the missing document, addressed specifically to the criterion the plan cited.

The appeal ladder, stage by stage

Medicare runs a fixed sequence for challenging a Part D denial, and it's worth knowing the whole ladder even if you never need to climb past the first rung.

Redetermination. Your plan reviews its own decision, but with someone who wasn't involved in the original refusal. Request it within 60 days of the denial notice.
Independent Review Entity (IRE) reconsideration. A body under contract to Medicare, currently C2C Innovative Solutions, looks at the case fresh if the plan upholds its denial. Request it within 60 days of the redetermination notice.
Administrative Law Judge (ALJ) hearing. Available through the Office of Medicare Hearings and Appeals, but only once the amount of money in dispute meets a yearly threshold.
Medicare Appeals Council review. A further check on the ALJ's decision, available to either side, requested within 60 days.
Federal district court. The final stage, reserved for cases meeting a higher dollar threshold and rarely reached in practice.

How fast each stage has to move

Every rung on that ladder comes with a decision deadline, and none of them are guidelines a plan or reviewer can quietly stretch. A missed deadline is treated as though the decision went against you, which is actually useful: it means you can move to the next stage immediately rather than waiting indefinitely.

Appeal stage	Who decides	Standard deadline	Expedited deadline
Redetermination	Your Part D plan, a different reviewer	7 calendar days	72 hours
IRE reconsideration	Independent Review Entity (C2C Innovative Solutions)	7 calendar days	72 hours
ALJ hearing	Administrative Law Judge, Office of Medicare Hearings and Appeals	90 days	10 days
Medicare Appeals Council	Departmental Appeals Board	90 days	10 days
Federal district court	A federal judge	Set by court procedure	Not applicable

The Part D appeal ladder: who decides, and Medicare's decision deadlines at each stage (42 CFR 423.582, 423.590, 423.600).

You have 60 days to file a request at each of the first three stages, counted from the date on the previous notice. The ALJ and federal court stages also carry a minimum amount in controversy: for requests filed in calendar year 2026, that's $200 to reach an ALJ and $1,960 to reach federal court. Most drug-cost disputes involving a single prescription never clear the second figure, which is exactly why the redetermination and IRE stages matter so much: for most people, they're the whole fight.

Is appealing actually worth it?

“Though a small share of prior authorization denials were appealed to Medicare Advantage insurers, most appeals (80.7%) were partially or fully overturned in 2024.”
— KFF, Medicare Advantage Insurers Made Nearly 53 Million Prior Authorization Determinations in 2024

Only around 11.5% of denied requests were appealed in 2024, according to the same analysis. Put those two figures together and something uncomfortable falls out: a lot of people who could very plausibly have had their denial reversed simply didn't ask. That gap is the whole argument for putting in the redetermination request even when you're tired, busy, or unsure it's worth the bother. The odds, once you actually appeal, are good.

Mistakes that sink an appeal

Missing the 60-day window. It's easy to set the letter aside meaning to deal with it later, and the deadline is unforgiving once it's passed.
Not asking for the expedited track when waiting genuinely could harm you. It has to be stated explicitly by your prescriber; the plan won't offer it unprompted.
Resubmitting the same weak justification instead of answering the actual reason on the notice. A denial for one stated criterion needs evidence against that criterion, not a repeat of the original request.
Giving up after one refusal, when the redetermination is only the first of several rungs and the data suggests genuine cases keep succeeding further up the ladder.

A denial, worked through: an illustrative case

This example is illustrative, built to show the mechanics rather than describe a real person. Picture a patient with type 2 diabetes whose endocrinologist prescribes a brand-name injectable after her oral medication stops keeping her blood sugar in range. The plan denies the request. Its notice cites a specific criterion: no record in the submitted paperwork that she'd already tried and failed a preferred oral therapy, which the plan's formulary requires before it will cover the injectable.

The trouble is, she had tried that therapy, two years earlier, and stopped after a month because of nausea severe enough that she couldn't keep meals down. Her current prescriber simply hadn't included that history in the original fax, since it happened before he took over her care. Rather than resubmitting the same request and hoping for a different answer, his office requests a redetermination within the 60-day window and attaches exactly what the notice asked for: the pharmacy fill record showing the earlier prescription, the date it was stopped, and a short clinical note explaining why. Nothing about the request changes. What changes is that it now directly answers the plan's stated reason for refusing.

A different reviewer at the plan looks at the redetermination and, inside the standard 7-day window, reverses the original decision. There was no need to ask for the expedited track here; her blood sugar was poorly controlled but not at a point where a week's delay posed a serious risk, and reserving urgent requests for cases that genuinely need them keeps the process credible when it really matters. Total time from denial notice to approval: under a week, and the outcome turned entirely on addressing the specific reason given rather than the strength of the original prescription.

What to include when you appeal

A copy of the denial notice itself, with its date clearly visible, since that date governs your 60-day window.
Whatever specific evidence the notice asked for: a lab result, a prior-treatment record, a diagnosis code, rather than a general restatement of the case for the drug.
An explicit statement from your prescriber if delay would seriously harm you, so the appeal is treated as expedited from the outset.
A note of who submitted the appeal and when, so you can track the 7-day or 72-hour clock yourself rather than relying on the plan to flag a missed deadline.

Frequently asked questions

How long do I have to appeal a prior authorization denial for Medicare Part D?

You have 60 days from the date of the denial notice to request a redetermination, the first level of appeal. The same 60-day window applies again at each stage above that, counted from the date of the previous decision.

What's the difference between a clinical denial and a missing-information denial?

A clinical denial means the plan reviewed your case and concluded you don't meet its medical criteria for the drug. A missing-information denial means the submitted paperwork didn't show something true about your case, such as a treatment you'd already tried. Fixing the second is usually far quicker than fixing the first.

Can I ask for an expedited appeal at any stage?

Yes, at both the redetermination and the Independent Review Entity stages, provided your prescriber states that waiting for a standard decision could seriously jeopardise your health or your ability to function. It shortens the decision window from 7 calendar days to 72 hours.

What happens if my redetermination is denied too?

You can request reconsideration from the Independent Review Entity, a body under contract to Medicare and separate from your plan. File within 60 days of the redetermination notice; it's decided on the same 7-day or 72-hour timeline.

Do I need a lawyer to appeal a prior authorization denial?

No. Redeterminations and IRE reconsiderations are designed to be requested by you or your prescriber without legal help. If a case genuinely reaches an Administrative Law Judge hearing, a patient advocate or attorney can be useful, but very few Part D drug appeals travel that far.

Related on Benefily

Sources

Administrative information only. Benefily reports what a payer has published in its own prior-authorization policy as of the effective date shown. It is not medical advice, not a coverage or payment guarantee, and not an authorization. Requirements vary by plan, place of service and member benefits — always verify with the payer before rendering service.