Last Updated: November 11, 2026
Quick Summary
A peer-to-peer review is a direct conversation between the treating clinician and a reviewing physician from the health plan, often used to resolve a prior authorization or medical necessity denial without a formal appeal. To request one, gather the denial letter and clinical records, then contact the plan’s utilization management team through its provider portal or phone line before the deadline stated in the denial.
- Request the review within the window stated in the denial letter or provider manual, since deadlines vary by plan.
- Ask whether the plan requires the treating clinician personally on the call, not just a billing representative.
- Gather the denial letter, member ID, clinician NPI, service codes and diagnosis codes before contacting the plan.
- Use the utilization management or provider services number on the denial letter, not the member services line on the card.
- Record the reference number, representative name and reviewer response time, and send a written follow-up if scheduling stalls.
Table of Contents
- What a Peer-to-Peer Review Is and When to Request One
- Why Insurers Deny Services and Claims
- Deadlines, Eligibility, and Who Can Request the Review
- Step-by-Step: How to Request a Peer-to-Peer Review Online or by Phone
- Preparing Your Records and the Request Script
- Peer-to-Peer Review Prior Authorization and Claim Denial Differences
- How Long a Peer-to-Peer Review Takes and What to Do If It Is Denied or Delayed
- Your Next Step: Getting Help With Denials at Your Practice
- Frequently Asked Questions
What a Peer-to-Peer Review Is and When to Request One
Most insurance denials for mental health services can be challenged before they become final. A peer-to-peer review is often the fastest way to do that. It is a direct conversation between the treating clinician and a reviewing physician from the health plan, and it can sometimes resolve a prior authorization or medical necessity denial without a formal appeal. The peer-to-peer review is also often what the insurer offers before a formal appeal begins.
Clinicians often lose time because they wait too long to ask for this conversation. Know what it is and when it fits, and you can act while the window is still open.
A peer-to-peer review usually makes sense when:
- The denial cites medical necessity and your clinical notes support the service
- The plan requires prior authorization and the request was denied
- You believe the reviewer applied the wrong criteria to your patient
- The denial reason could be cleared up with a clinical explanation
The review is a clinician-to-clinician discussion. It is not a billing dispute. Keep your focus on the patient’s clinical need.
Why Insurers Deny Services and Claims
Insurers deny services for a few common reasons. Knowing the reason tells you whether a peer-to-peer review will help.
- Missing or unclear documentation. The chart does not show the diagnosis, the treatment plan, or the reason for the level of care.
- Medical necessity concerns. The plan decides the service is not needed at that intensity or frequency.
- Prior authorization not obtained. The service was delivered without approval, or the approval covered fewer sessions.
- Coding or billing mismatches. The diagnosis code, service code, or modifier does not match the note.
Many denials are fixable with better records. A peer-to-peer review works best when the clinical story is clear and the denial reason is specific.
Deadlines, Eligibility, and Who Can Request the Review
Timing and eligibility are the two most common reasons a peer-to-peer request is refused, and they are rarely explained in one place. Check both before you start the call.
Request windows
Plans set their own peer-to-peer windows, and the period is usually stated in the denial letter or in the provider manual. Many commercial plans allow a short window measured in business days from the date of the decision, while some Medicare Advantage organizations align their timing with the expedited or standard reconsideration schedule. Where the letter is silent, ask the plan directly and write down the answer with the representative’s name and the date.
Can you request a review after an appeal has started?
This depends on the plan. Some plans treat a peer-to-peer review as a step that is available only before a formal appeal is filed, and they may close the review option once a written appeal is logged. Other plans allow a peer-to-peer call during an open appeal, particularly when new clinical information is being added. If the plan has already closed that window, learn how to write a formal insurance appeal letter instead.
Who may request the review
In most plans the treating or ordering clinician must be the one who speaks with the reviewer, because the review is a clinician-to-clinician discussion. A practice representative may often submit the initial request on the clinician’s behalf, but many plans require that the clinician personally participate in the call. Confirm two things with the plan: whether a non-clinical staff member can submit the request, and whether the clinician must be the one on the line when the reviewer calls back.
Differences by plan type
- Commercial plans usually set their own windows and eligibility rules in the provider manual, which is often more detailed than the denial letter.
- Medicaid managed care plans follow state-specific rules, so the state Medicaid agency’s guidance and the managed care plan’s policy should both be checked.
- Medicare Advantage plans must follow Medicare rules for reconsiderations, and the plan’s peer-to-peer policy should be read alongside those timelines.
Because these rules change, record the policy number or manual section the plan cites, and keep a copy with the authorization file.
Watch out: A plan may accept a request from a billing coordinator but still refuse to schedule the call unless the treating clinician is named as the participant, so confirm this before the window closes.
Step-by-Step: How to Request a Peer-to-Peer Review Online or by Phone
The request itself is usually simple, but the details decide whether it reaches a reviewer in time. Most plans route peer-to-peer requests through their utilization management or medical management department, not through general member services or the claims department. Start there.
Before you contact the plan, gather these items:
- The denial letter, including the reason code, claim or authorization number, and the date of the decision
- The patient’s member ID and date of birth as they appear on the insurance card
- The rendering clinician’s name, National Provider Identifier (NPI), and direct callback number
- The requested service, the CPT or HCPCS code, and the diagnosis code(s) on the request
- Your availability windows for the call, including the time zone
Choosing a channel
Provider portal. Many health plans accept peer-to-peer requests through a secure provider portal. Look for a section labeled authorizations, referrals, or case management. Some portals require you to choose “request peer-to-peer” from a dropdown tied to the specific authorization number. Save a screenshot or PDF of the confirmation page.
Phone. Use the utilization management or provider services number printed on the denial letter, which is often different from the member services line on the back of the card. Once the representative logs the request, keep the reference number and any follow-up instructions with the claim record, a habit that also helps when coordinating insurer communications about fleet repairs with Total360™.
Fax or written request. Some plans still accept requests by fax. If you use this route, include the same identifiers listed above on the first page and call to confirm receipt.
What to ask before you hang up
Before ending any call, confirm four things: the reference number for the request, the name or ID of the representative, the reviewer’s expected response time, and the best callback number for the reviewer. Repeat the reference number back to the representative to avoid transcription errors.
When the request cannot be scheduled
If the portal returns an error, the phone line only offers a callback queue, or the plan says no reviewer is available within the window, document each attempt with the date, time, and name of the person you spoke with. Then send a short written follow-up through the same channel, restating the authorization number, the original request date, and the reference number.
Watch out: A peer-to-peer request filed after the plan’s stated window may be refused even if the reviewer is willing to talk, so calendar the deadline the day you receive the denial.
The request channels and the details to gather before contacting the plan are summarised below.
| Channel | What to use | Confirm before ending the call |
|---|---|---|
| Provider portal | Authorizations, referrals or case management section | Save a screenshot or PDF of the confirmation |
| Phone | Utilization management or provider services number on the denial letter | Reference number, representative name, reviewer response time |
| Fax or written request | Same identifiers on the first page | Call to confirm receipt |
| Portal or phone error | Document each attempt with date, time and name | Send a written follow-up restating the authorization number |
Preparing Your Records and the Request Script
Gather the clinical records before the call. Include the intake assessment, the diagnostic evaluation, the treatment plan, and recent progress notes. Highlight the passages that show medical necessity.
Use a short script to keep the call focused:
“I’m calling about [patient identifier], authorization [number], denied for [reason]. I’m the treating clinician. I’d like to discuss the clinical basis for the service, including [diagnosis], the treatment plan, and the functional impairment documented on [date]. What times are available for the review?”
Keep the discussion on clinical facts. Have your notes open, and be ready to explain why the level of care is necessary.
Peer-to-Peer Review Prior Authorization and Claim Denial Differences
A prior authorization denial happens before care. A claim denial happens after the service was billed. The peer-to-peer route can apply to both, but the approach differs.
- Prior authorization: The review focuses on whether the service should be approved going forward. Ask for the approval to cover the full clinical plan.
- Claim denial: The review focuses on whether the service met coverage rules for that date. Documentation of the visit matters most.
If you are unsure which applies, ask the plan’s representative to confirm the denial type before the call.
How Long a Peer-to-Peer Review Takes and What to Do If It Is Denied or Delayed
A typical peer-to-peer call is short, often around 15 to 30 minutes, but scheduling can take days. If the review is delayed, follow up in writing and cite your original reference number. If the review is denied or the plan will not schedule one, ask for the written reason and the next appeal step.
Track every contact. A clear timeline makes it easier to move to a formal appeal if the first route fails.
Your Next Step: Getting Help With Denials at Your Practice
Denials take time away from patients. If your team is spending hours on peer-to-peer requests and appeals, that workload can be shared. Practices that want help can work with a revenue cycle partner to manage denials, credentialing, and billing workflows so clinicians can focus on care.
Take the 2-Minute Billing Audit to see where denials are costing your practice money. Get started with Healthcare Partners Consulting and Billing and recover the revenue your clinical work has earned.
Frequently Asked Questions
How long does a peer-to-peer review take for insurance?
A peer-to-peer review is usually a single phone conversation between the treating physician and the insurer’s reviewing physician, and the call itself is typically short. The bigger variable is scheduling: the window to request one and the time before a call can be arranged depend on the insurer and the plan. Confirm the review window stated in the denial letter, request the call as early as the policy allows, and document the date, time, and outcome of any call that takes place.
Can an insurance company refuse a peer-to-peer review?
Some insurers limit or do not offer peer-to-peer reviews, and some only allow them within a set period after the denial. If a request is declined or unavailable, ask the insurer to state in writing why and what alternatives exist. A peer-to-peer review is generally not the same as a formal external review or appeal, so if it is unavailable, move to the written appeal process in the denial notice and track every deadline.
What information should a provider have ready for a peer-to-peer call?
Have the denial letter or reference number, the specific service and CPT or HCPCS codes in question, the diagnosis, and the clinical notes that support medical necessity. Include the treatment history, any prior failed alternatives, and the specific clinical criteria the insurer cited. Prepare a short summary of why the requested service is needed, so the physician can address the denial rationale directly during the call.
Can a peer-to-peer review overturn an insurance denial?
A peer-to-peer review can lead to a reversal when the reviewing physician agrees that the documentation shows medical necessity under the plan’s criteria. It does not guarantee a change, and some denials are upheld. If the decision stands, ask what additional documentation would change the outcome, note the next appeal step and its deadline, and do not let the review window pass while you pursue other options.
