Peer-to-Peer Review: How to Request One and What to Say

When your insurer denies a claim, the decision usually comes from a physician reviewer who has never met you, never examined you, and may have spent less than ten minutes on your file. A peer-to-peer review gives your treating physician a direct line to that reviewer — and it is one of the most effective tools for reversing a denial before you ever file a formal appeal.

What Is a Peer-to-Peer Review?

A peer-to-peer (P2P) review is a phone call between your treating physician and the insurance company's medical director or utilization management reviewer. Most managed care plans and many insurance policies permit or even require insurers to offer this option after a Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization denial or a utilization review denial.

The concept is straightforward: the insurer's physician reviewer hears clinical justification directly from the doctor who knows your case. Reviewers who deny claims on paper are often more willing to reconsider when confronted by a knowledgeable specialist who can address specific concerns in real time.

P2P reviews are distinct from a formal appeal. They are informal and fast — typically scheduled within one to three business days — and they can overturn a denial without creating a lengthy appeals record. For that reason, requesting a P2P should almost always be your first step after a prior authorization or utilization management denial.

When to Request a Peer-to-Peer Review

A P2P review is most useful when:

• A prior authorization was denied and surgery or treatment is scheduled soon
• The denial letter cites "medical necessity not established" or "doesn't meet clinical criteria"
• The insurer used InterQual, MCG (formerly Milliman), or another third-party criteria set
• Your specialist believes the denial reflects a misunderstanding of your diagnosis
• You are dealing with a complex or rare condition that a generalist reviewer may not fully understand

P2P is less useful when the denial is purely administrative (e.g., wrong billing code, out-of-network provider, coverage exclusion) or when the plan has already issued a final adverse benefit determination after a full appeal.

How to Request a Peer-to-Peer Review

Step 1: Act within the window. Most insurers offer P2P reviews only within a short window after the denial — often 30 days, sometimes as few as 10 business days. Check the denial letter for deadlines.

Step 2: Have your doctor's office make the call. The request must come from a licensed provider, not the patient. Most insurers have a dedicated provider line for P2P requests; the number is usually on the denial letter or on the insurer's provider portal.

Step 3: Gather documentation before the call. Your physician should have at hand: the denial letter, your medical records supporting the request, relevant clinical guidelines (NCCN, ACC/AHA, UpToDate), and if possible, peer-reviewed studies showing the treatment's efficacy for your diagnosis.

Step 4: Confirm and document. Get the name and credentials of the insurer's reviewer, the date and time of the call, and ask whether a written summary or decision will follow. Follow up in writing if the denial is reversed.

What Your Doctor Should Say: A Script Template

Below is a framework your physician can adapt. The goal is to be collegial, specific, and clinically authoritative.

"Thank you for taking the time to speak with me. I'm calling about the denial for [patient name], [date of service/authorization request number]. I understand the denial was based on [stated reason]. I'd like to walk you through why I believe this meets medical necessity under your criteria.

[Patient] has [diagnosis] confirmed by [test/imaging/exam date]. We have tried [prior treatments] without adequate response — specifically [describe outcomes]. The proposed treatment is [procedure/medication/service], which is consistent with [guideline name and version], specifically [section or recommendation grade].

My concern with waiting or using an alternative approach is [describe clinical risk — e.g., disease progression, functional decline, irreversible harm].

Can you tell me specifically which criterion you found was not met? I'd like to address it directly."

Encouraging the reviewer to name the unmet criterion is key. Once they identify it, your doctor can respond with targeted evidence, turning a one-sided paper review into a genuine clinical dialogue.

After the Peer-to-Peer Review

If the denial is reversed: get the approval in writing before proceeding with treatment. Confirm the authorization number and the services covered.

If the denial is upheld: ask the reviewer to document the specific clinical reason for upholding the denial. This becomes valuable evidence in your formal internal appeal. You now know exactly what gap to address with additional documentation.

Do not let a failed P2P review discourage you. Studies show that a significant portion of denials upheld in P2P reviews are later reversed on formal appeal, particularly when the appeal includes targeted medical literature and specialist support letters.

Combining P2P with a Formal Appeal

The P2P review does not reset your appeal clock. If the deadline for a formal internal appeal is approaching, file the appeal in parallel. Most insurers allow both to proceed simultaneously, and the P2P outcome — even if it upholdsthe denial — gives you specific objections to rebut in your written appeal.

Fight Back With ClaimBack

If your insurer denied a prior authorization or claim and you need help building an appeal after a failed peer-to-peer review, ClaimBack can help you draft a targeted, evidence-backed appeal letter in minutes.

Start your appeal at ClaimBack

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs. External Insurance Appeal