guide
How to appeal a prior authorization denial
A prior authorization denial is not a final answer. It is a routing decision that you can change, but only if you respond to the actual reason the payer cited and follow the appeal path that the patient’s coverage type defines. Most teams lose appeals not because the clinical case is weak, but because they file the wrong kind of response or miss the window printed on the denial letter.
This guide is written for authorization coordinators and billers who handle denials at volume. It is the cross-payer companion to Silna’s individual payer guides: the exact appeal addresses, portals, and reconsideration forms differ by carrier, so where routing is payer-specific we point you to the payer page. Here we cover the framework that holds true regardless of who issued the denial.
Triage the denial before you respond
The single most common reason an appeal fails is that it answers a question the payer never asked. Before you write a letter or pull a chart, identify which of two categories the denial falls into, because each requires a completely different response.
Administrative denials are problems with the record, not the medicine. A transposed member ID, a procedure code that conflicts with the place of service, a missing or mismatched provider NPI, an absent authorization number on the claim, or an expired authorization all fall here. These resolve through a corrected resubmission, not a formal appeal. Filing an appeal for an administrative problem routes the case to a slower queue and spends an appeal level you may need later.
Clinical denials challenge medical necessity or level of care. These require a physician-authored argument and supporting evidence, and they follow the formal appeal ladder for the patient’s coverage type. A corrected claim does nothing for a clinical denial; a clinical letter written for an expired authorization wastes a physician’s time.
A third situation is worth naming because it often masquerades as a denial: an eligibility or benefits problem. Confirm active coverage, the correct member ID, and the applicable benefit before filing anything. Many of these close at re-verification, before an appeal is ever needed. Mixing these categories is how teams exhaust appeal rights on problems a five-minute correction would have solved.
The denial reason code tells you which category you are in. Pull the payer’s specific coverage policy or clinical criteria referenced on the explanation of benefits, because that document is the exact standard your appeal will be measured against. If your response does not address those criteria by name, it fails at first review regardless of how strong the underlying case is. Working denials across more than one payer? Start with Silna’s complete guide to prior authorization.
The appeal ladder by coverage type
Once you have confirmed a denial is clinical, the path to reversal is dictated entirely by the patient’s coverage type. Each ladder has a different sequence of internal and external reviewers, and a different final authority. Skipping a rung, or going to the wrong external body, can forfeit the appeal.
Commercial plans. Start with a peer-to-peer review, then the internal first-level appeal, then the internal second-level appeal where the plan offers one. If the plan upholds the denial after internal review is exhausted, the case moves to external review by an Independent Review Organization (IRO) under state or federal law. The IRO decision is binding on the plan.
Medicare Advantage. The first step is plan reconsideration. If the plan upholds the denial, the case is forwarded automatically to the Independent Review Entity (the contractor for this is Maximus), then to an Administrative Law Judge at the Office of Medicare Hearings and Appeals (OMHA), then to the Medicare Appeals Council, and finally to federal court. The filing window is typically about 60 days from the denial notice; confirm the current window in the plan’s provider manual, as it is set in federal regulation and enforced strictly.
Original Medicare (fee-for-service). The sequence is redetermination by the Medicare Administrative Contractor (MAC), then reconsideration by a Qualified Independent Contractor (QIC), then an Administrative Law Judge at OMHA, then the Medicare Appeals Council, and finally federal court. The reviewers differ from Medicare Advantage even though the upper rungs share the OMHA and Council levels.
Medicaid. For managed-care members, file the managed care organization’s internal appeal first; if that is denied, request a state fair hearing. Timelines and the exact fair-hearing process are set at the state level, so the denial letter and the state Medicaid agency are your sources.
For the exact portal, address, reconsideration form, and current deadline for any specific carrier, use that payer’s dedicated guide. This page is the canonical cross-payer reference for the structure; the per-payer routing lives on the individual payer pages.
| Coverage type | Internal levels | External / final levels |
|---|---|---|
| Commercial | Peer-to-peer, then internal Level 1, then internal Level 2 (where offered) | Binding external review by an Independent Review Organization (IRO) under state or federal law |
| Medicare Advantage | Plan reconsideration | Independent Review Entity (Maximus), then ALJ at OMHA, Medicare Appeals Council, federal court |
| Original Medicare | MAC redetermination, then QIC reconsideration | ALJ at OMHA, Medicare Appeals Council, federal court |
| Medicaid (managed care) | Managed care organization internal appeal | State fair hearing |
Deadlines and expedited review
There is no universal appeal deadline. Commercial payers set their own windows, Medicaid windows are set by state, and Medicare Advantage runs on a federally defined timeline that is typically about 60 days from the denial notice. The reliable source is always the denial letter itself, which states the specific deadline and the level you are appealing. Treat any assumed standard timeframe as a guess that can cost the patient the appeal.
Request expedited review when the standard timeline would seriously jeopardize the patient’s life, health, or ability to regain maximum function. This threshold is defined in federal regulation, not left to payer discretion. The decision rule is simple: if documented clinical urgency exists, ask for expedited review and attach the rationale; if it does not, file on the standard track. Requesting expedited review without documented urgency results in reclassification to the standard track, which resets the clock and adds delay rather than removing it.
The peer-to-peer review
A peer-to-peer review connects the treating physician directly with the payer’s reviewing medical director and frequently produces a same-day or next-day reversal on a clinical denial. It is the highest-leverage move in the entire process, often faster and more effective than a written appeal, and it does not consume a formal appeal level.
Request it as soon as the denial arrives, before investing hours in a full written package. Most payers offer a peer-to-peer window of only a few business days after denial, so confirm the specific window on the denial letter or by calling the payer’s provider line. If the denial came from a delegated benefit manager rather than the plan itself, the peer-to-peer runs through that entity.
The physician should enter the call with the payer’s stated denial criteria in hand and a prepared, point-by-point rebuttal. An unprepared call rarely reverses anything. The objective is a clinician-to-clinician conversation that addresses the cited criteria directly, references the relevant guidelines, and walks through the patient’s treatment history. If the call does not reverse the denial, document what the medical director cited as the remaining concern, because that becomes the blueprint for the written appeal.
What goes in the appeal packet
A complete clinical appeal has four components, and they must be submitted together. Missing any one gives the reviewer grounds to uphold the denial without engaging the clinical argument at all.
- Physician’s letter of medical necessity. The letter must address the payer’s specific denial criteria by name and explain, line by line, why the requested service meets each threshold. A generic letter that restates the diagnosis without engaging the stated reason for denial fails at first review.
- Relevant clinical records. Office visit notes, diagnostic results, prior treatment history, and documentation that less intensive alternatives were considered or attempted where the payer’s criteria call for it.
- Peer-reviewed literature or clinical guidelines. Cite the specific guideline, its version or year, and the relevant passage, and attach the pages. Published specialty-society and clinical guidelines carry more weight in review than an internal summary alone.
- Direct rebuttal of every cited criterion. Each item the payer named in the denial must have a corresponding document or argument in the packet. If the denial cites failure of a specific criterion in the coverage policy, the appeal must answer that criterion by its number. Incomplete documentation is the leading cause of upheld clinical denials.
Submit it as a single organized file with a cover letter referencing the denial number, the member ID, the date of service, and the procedure code, so the reviewer can match your appeal to the denial record without hunting for it.
How Silna reduces denials
The most reliable way to win the appeals battle is to fight fewer of them. Most avoidable denials trace to preventable causes that are detectable before the request ever leaves the practice: incomplete clinical documentation, mismatched codes, and missing fields that the payer treats as an incomplete submission and that reset the authorization clock.
Silna Health’s Care Readiness Platform automates the workflow end to end, and its Predictive Document Intelligence flags documentation gaps and likely errors at the point of submission, before the payer sees the request. Catching those failures up front shrinks the volume of denials that ever enter the triage, packet-assembly, and follow-up cycle that appeals demand. By combining automation with built-in payor communication, Silna cuts pre-visit administrative work by 95%, per Silna Health, 2026.
For teams managing denials across commercial, Medicare Advantage, Original Medicare, and Medicaid lines at once, the value is consistency: the first submission is the complete submission, and the appeals that remain are the ones genuinely worth fighting. See how it applies to your payer mix at silnahealth.com.
Key terms
- Administrative denial
- A denial caused by a record problem (wrong code, missing NPI, expired authorization) that is fixed by corrected resubmission, not a formal appeal.
- Clinical denial
- A denial of medical necessity or level of care, appealed with a physician letter and supporting evidence through the coverage type’s appeal ladder.
- Peer-to-peer (P2P) review
- A time-limited call between the treating physician and the payer’s medical director that can overturn a clinical denial without spending formal appeal rights.
- Independent Review Organization (IRO)
- An outside body that conducts a binding external review of a commercial denial after internal appeals are exhausted, under state or federal law.
- Independent Review Entity (IRE)
- The independent contractor (Maximus) that reviews a Medicare Advantage denial after plan reconsideration, before the case reaches an Administrative Law Judge.
- State fair hearing
- The external appeal step for Medicaid members, requested after the managed care organization’s internal appeal is denied; process and timelines are set by the state.
Frequently Asked Questions
This article is general educational information, not medical or insurance advice. Coverage rules, appeal deadlines, and clinical criteria vary by plan and state, so consult a licensed healthcare professional or your plan administrator about your specific situation.
About the author
Jeffrey Morelli
Jeffrey Morelli is the Co-Founder and CEO of Silna Health, the first Care Readiness Platform built to remove the administrative barriers that delay care. Silna automates benefit checks, eligibility, and prior authorizations across 1,000+ payors, and is backed by $27M from Accel and Bain Capital Ventures. Before Silna, Jeff spent a decade in San Francisco building and scaling products for highly regulated industries, including leading go-to-market at Truework (Series C, acquired by Checkr).
Last reviewed: June 25, 2026.