Denied Claim After Prior Authorization: What to Do Next
If your claim was denied even though you had prior auth, use this playbook to challenge it quickly.
Updated 2026-04-13Get proof of approval first
Pull the prior authorization number, approval date, and covered service details from your portal, emails, or provider records. Appeals win faster when you show exact authorization evidence.
Match the denied claim to the approved service
Compare CPT/HCPCS codes on the denial to what was authorized. Denials often happen when billing codes differ slightly from the approved request.
Do this before your next billing call
Run your EOB through the analyzer in 2 minutes
Get a focused review and action checklist based on your claim details before you call insurer or provider billing.
Check My EOB NowAsk insurer to reprocess before formal appeal
Call member services and request immediate reprocessing based on prior authorization already on file. Ask for a reference number and expected completion date.
Submit a focused written appeal if needed
Attach prior auth proof, denial EOB, and provider notes. State that the service was pre-approved and request reversal based on plan terms and insurer authorization history.
Escalate if deadlines are close
If bills are aging, ask provider billing for a hold while appeal is active. If internal review fails, escalate to external review through your state process.
Ready to apply this to your own bill?
Upload your EOB and get a claim-by-claim review with an appeal prep plan.
Analyze My EOBNeed outside help?
Use official resources and vetted marketplaces to compare options and escalate appeals.
FAQ
Can an insurer deny a service after approving prior authorization?
They can, but denials are often reversible when you provide documentation that service details match the approved request.
What is the fastest evidence to include in this appeal?
Include the authorization number, approval date, service code details, and denial EOB in one packet to speed review.