Prior authorization appeal generator
A prior authorization appeal letter responds to a denied or missing PA with the determination reference number and the reason on the notice. Process denials (PA never submitted) may qualify for retrospective authorization; clinical denials need records that meet the plan’s criteria. Urgent and standard clocks differ by plan type and are stated on the determination letter.
Loading generator…
Practical guide
How to appeal a prior authorization denial or missing PA
Who this is for
- Members whose claim denied as “no prior authorization” or “auth required”
- Clinics with a denied PA reference number from a UM vendor
- Patients whose elective service was scheduled but PA was denied on clinical grounds
- A new PA request is not the same as an appeal of a denied PA
- Medical-necessity-only denials after service may need the medical necessity generator instead
What to do
Step 1: Read the remark code
CO-197 / “auth required” is different from “does not meet criteria.” Fix process errors with retro auth; fix clinical denials with records.
Step 2: Check if the setting waived PA
Emergency and many inpatient services have different PA rules. Attach the ER record if care could not wait for prospective approval.
Step 3: Use the vendor and the plan
If eviCore or Carelon denied PA, appeal there and keep the health plan appeal rights on the EOB. Mailing only one address can stall the case.
Step 4: Submit a complete packet
Order, clinical notes, codes, and the PA ID. Incomplete packets are denied again. Include proof the original PA was filed if the dispute is administrative.
Step 5: Ask for expedited review when delay risks harm
Many plans decide urgent PA appeals on a short clock (often 72 hours). Request expedited review in writing and document clinical urgency.
Step 6: Preserve the appeal right in writing
Peer-to-peer may overturn a PA, but file a written prior authorization appeal letter before the deadline so you keep the formal right if the call fails.
Documents to gather
- PA determination letter and reference number
- EOB remark codes and claim number
- Clinician order and office notes
- Proof of submission or portal screenshot if PA was filed
- ER or inpatient records if retro auth is requested
- Plan evidence of coverage PA section (optional)
PA appeal windows are on the determination notice and may be shorter than a post-service claim appeal. Treat the notice date as day one.
Weak vs strong wording
Weak
Please authorize this because we already did the procedure.
Stronger
PA request [ID] denied [reason]. Emergency presentation on [date] made prospective PA impracticable (ER notes attached). Request retrospective authorization of [CPT] under plan emergency exception.
Retro auth needs a reason PA could not be obtained in advance.
Weak
My doctor ordered this so PA should be automatic.
Stronger
PA [ID] denied for [clinical reason]. Chart documents [criterion A, B] per plan policy [name]. Request overturn and authorization of [CPT] for dates [range].
An order starts PA; approval still requires meeting the plan’s clinical criteria on the record.
Weak
Resubmitting the same PA form without new records.
Stronger
Formal appeal of determination [ID] dated [date]. Attach PT log, imaging, and peer-to-peer summary. Request review under plan UM rules and 29 CFR 2560.503-1 if ERISA applies.
An appeal must address the stated denial reason with new evidence, not repeat an incomplete first submission.
Mistakes to avoid
- Starting a brand-new PA instead of appealing the denied one (you lose the record)
- Missing the vendor portal listed on the letter
- Assuming 180 days when the PA notice shows a shorter UM appeal window
- Relying on peer-to-peer alone without a written prior authorization appeal letter
Authoritative sources
- HealthCare.gov: prior authorization
- 29 CFR 2560.503-1 ERISA claims
- CMS: Medicare prior authorization programs
Related AppealFlow pages
- Prior auth denial walkthrough
- Medical necessity generator
- Imaging PA generator
- Medication PA timelines
- All appeal tools
FAQs
What is a prior authorization appeal letter?
A written request to overturn a denied PA or to obtain retrospective authorization when PA was not obtained in advance. It cites the determination ID and answers the reason on the notice.
Can I get PA after the service?
Sometimes, especially for emergencies or when the plan’s rules allow retrospective review. Attach clinical urgency. Elective services done without PA are harder to salvage.
How long does prior authorization take?
Non-urgent PA is often days to two weeks; urgent requests are faster. Your plan’s evidence of coverage states the clock. A delay is not itself an approval.
Is a peer-to-peer the same as an appeal?
Peer-to-peer is a clinical discussion that may overturn a PA. Still file a written appeal before the deadline so you do not lose the formal right if the call fails.
What if the office forgot to submit PA?
Ask the office to request retro auth and write what happened. Some plans still deny. You can appeal as the member; the office should cooperate with records.
Does Medicaid use PA too?
Yes. Follow the Notice of Action. State fair hearing rights may apply in addition to the plan appeal.
How do I appeal a prior authorization denial for surgery?
Use the PA reference number, attach the surgical order and notes showing criteria are met, and request expedited review if delay risks harm. Do not schedule elective surgery until PA is approved unless the clinician documents urgency.
Should I wait to have the surgery?
If the service is elective and PA is denied, wait for approval or a successful appeal unless the clinician documents urgency. That is a clinical decision, not an AppealFlow recommendation.
Submit to the vendor and plan listed on the notice. Keep confirmation numbers.
Free draft tool · Review with your clinician · Not legal or medical advice · Disclaimer