Peer-to-Peer Review Guide: How Your Doctor Can Reverse Your Denial

Before your doctor writes a formal appeal letter, there's a faster and often more effective tool: the peer-to-peer review. In a peer-to-peer (P2P) review, your treating physician calls the insurance company's medical director directly and makes the case for your care in real time. Reported overturn rates for P2P reviews range from 60–70% — dramatically higher than written appeals alone. Here's how to make it happen.

What Is a Peer-to-Peer Review?

A peer-to-peer review is a direct physician-to-physician conversation between your treating doctor and the insurance company's medical reviewer — typically a medical director or clinical reviewer on staff at the insurer or its utilization management vendor. Unlike a written appeal, a P2P allows:

• Your physician to present clinical nuances that are hard to convey in writing
• Real-time dialogue about the specific clinical concerns driving the denial
• The insurer's reviewer to ask clarifying questions
• Immediate reversal if the reviewer is persuaded

P2P reviews are not guaranteed — they're offered at the insurer's discretion for most plans (though some state laws mandate them). But they're worth requesting immediately after any denial for a service where medical necessity is at issue.

When to Request a Peer-to-Peer Review

P2P reviews are most effective for:

• Prior authorization denials (requesting approval before a procedure)
• Concurrent review denials (when coverage is being cut off mid-treatment)
• Retrospective denials of recently performed services
• Mental health level-of-care denials (residential, IOP, PHP)
• Specialty drug prior authorization denials
• Surgery or procedure denials where the physician has strong clinical reasoning

They're less effective for purely administrative denials (wrong billing code, missing prior auth on a service that wasn't pre-authorized in time) — those are better resolved through claim correction.

How to Request a Peer-to-Peer Review

The patient typically initiates the P2P request by:

1. Calling the insurer's prior authorization or utilization management department
2. Stating: "I would like to request a peer-to-peer review for the denied service. Can you connect me with the process to schedule this?"
3. Getting the name, phone number, and availability window for the insurer's medical reviewer
4. Immediately contacting your physician's office and passing this information to their authorization or appeals coordinator

Your physician's office — not you — makes the actual P2P call. Your role is to request the opportunity and make sure your doctor's office follows through quickly.

Preparing Your Doctor for a Successful P2P

The success of a P2P review depends heavily on preparation. Help your physician prepare by:

Providing the Denial Information

• The specific CPT codes denied
• The exact denial reason as stated in the denial notice
• The specific clinical criteria the insurer used (ask for a copy of the criteria used in the denial)
• The name and credentials of the insurer's reviewer, if available

Identifying the Strongest Clinical Arguments

Your physician should be prepared to address:

• The specific clinical reason the service is medically necessary for this patient (not just generally)
• Why the denial criteria don't apply or are being misapplied
• What alternative treatments have been tried and why they failed or are contraindicated
• Clinical guidelines from relevant specialty organizations that support the requested service
• Peer-reviewed literature if the insurer's reviewer is likely to cite evidence in the denial
• The potential harm from delaying or denying the service

Requesting Information During the Call

Your physician should ask the reviewer:

• What specific criteria are you applying to this denial?
• What additional information would be needed to reverse it?
• What is your specialty background? (If the reviewer is not board-certified in the relevant specialty, this is worth noting in a subsequent formal appeal)

After the Peer-to-Peer Review

If the P2P Succeeds

Get the reversal in writing. Ask the reviewer to send a written confirmation of the approval, and follow up with the insurer's authorization department to confirm the service is approved in their system before proceeding.

If the P2P Fails

A failed P2P is not a dead end — it's a rehearsal for the formal appeal. Your doctor should document:

• The date, time, and name of the reviewer
• The specific clinical criteria cited in the denial
• The reviewer's stated reasons for upholding the denial
• Any areas where the physician's clinical arguments were not adequately addressed

This documentation strengthens your formal written appeal. The formal appeal should directly counter each reason the reviewer gave in the P2P. If the reviewer who denied the P2P is not board-certified in the relevant specialty, note this — many states require specialty-matched review for complex cases.

State Laws Requiring Peer-to-Peer Reviews

Several states have enacted laws strengthening the P2P process:

• Some states require insurers to offer P2P reviews upon request
• Some states require that P2P reviewers be board-certified in the same or similar specialty as the treating physician
• Some states require a second P2P opportunity if the first review is conducted by a non-specialist

Check your state insurance department's utilization management regulations for specific requirements. Our state directory can help you locate your state's insurance commissioner.

For a comprehensive look at what makes appeals succeed — both P2P and formal — read our appeal success rates guide. If the P2P fails, use our free appeal letter generator to build your formal written appeal.

Sources: American Medical Association (AMA) prior authorization resources · MGMA peer-to-peer review guidance · State utilization management laws. Disclaimer: This article is for informational purposes only. P2P review availability and procedures vary by insurer and state. Last updated: March 2026.