Aetna CO-197 Prior Auth Denials in Dermatology
Precertification / authorization / notification absent. Copy-paste appeal letter with documented overturn rate and attachment checklist for Aetna in Dermatology.
Verify before filing
Filing deadlines, appeal addresses, and policy criteria in this template reflect typical payer behavior at publication. Aetna updates policies frequently and plan-level rules vary by employer group, state, and line of business. Always cross-check the specific deadline and filing address on your EOB, and confirm current Aetnamedical-policy language through the payer’s provider portal before submitting an appeal. Overturn-rate language below reflects AAPC-reviewer consensus, not payer-published statistics.
When to use this template
Aetna dermatology prior-auth centers on two high-cost categories: biologic drugs and Mohs micrographic surgery outside standard coverage zones. Biologics (Dupixent 96377, Cosentyx, Skyrizi, Tremfya, Stelara) require prior authorization plus failed conventional therapy documentation. Mohs surgery (17311, 17313, 17315) is covered without auth on head, neck, hands, feet, and genitalia, but requires prior auth everywhere else.
Attachment checklist
- Ordering provider note with clinical indication
- Prior workup or conservative-care documentation
- Payer medical policy reference citing met criteria
- Retroactive authorization request (if applicable)
Missing any one of these is the single largest cause of appeal denials. Build a pre-filing checklist before you submit.
Copy-paste letter template
Swap in your patient details at every [bracketed field]. Attach the documentation listed above. Submit within 180 days of the original adjudication.
[Practice Letterhead] [Date] Aetna Provider Resolution Unit PO Box 14463 Lexington, KY 40512 Re: Appeal of CO-197 Denial Member: [Patient Name] Member ID: [Member ID] Date of Service: [DOS] Claim Number: [Claim #] CPT: [e.g., 96377 - Biologic injection; or 17311 - Mohs first stage] To Whom It May Concern: We are appealing the CO-197 prior-authorization denial for the above-referenced dermatology service. The service was medically necessary and meets the criteria established in Aetna CPB [number]. Clinical Indication: [Biologic case:] Patient with [condition, e.g., moderate-to-severe atopic dermatitis, psoriasis] has failed [X weeks] of conventional therapy including: - [Topical steroid name, potency, duration, response] - [Phototherapy: UVB/PUVA, number of sessions, response] - [Prior biologic trial if applicable] [Mohs case:] Patient has a biopsy-confirmed [pathology, e.g., BCC, SCC] located at [body site]. Clinical features indicating Mohs necessity include [size X cm, location rationale, histologic subtype, recurrent/immunosuppressed]. Documentation attached: 1. Treating dermatologist H&P 2. Step-therapy / failed conservative care documentation 3. [For Mohs] Biopsy pathology report 4. Retroactive authorization request filed [date] 5. Aetna CPB [number] criteria worksheet We respectfully request approval and reprocessing. [Dr. Name] is available for peer-to-peer at [phone]. Sincerely, [Name]
Request retroactive authorization first (within 30 days of denial), before escalating to a formal appeal. Most prior-auth CO-197 denials are resolved faster via retro-auth than the full appeal pathway.
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Related templates
Same code, different payer. Or same payer, different problem
Want the full playbook for this scenario?
The complete playbook page covers why Aetna throws CO-197 specifically in dermatology, the exact fix workflow, filing deadlines, high-risk CPTs, and FAQs. Plus this same copy-paste letter.
Read the full playbookCommon questions on this template
How long do I have to file a CO-197 appeal with Aetna?
180 days from the initial adjudication date for most Aetna plans. Corrected claims (for administrative fixes like missing modifiers or auth numbers) have a different and usually longer window. Always confirm the specific deadline on the EOB for your claim.
What is the typical overturn rate for this denial type?
55-70 percent for biologics; 75-85 percent for Mohs with pathology. Success depends heavily on documentation completeness and whether the clinical criteria in Aetna's medical policy are matched point-by-point in the appeal.
Should I file this as a corrected claim or a formal appeal?
CO-197 denials are usually formal clinical appeals. The template below follows the formal-appeal structure. Use a corrected claim only if the fix is administrative (a missing modifier, wrong NPI) rather than clinical.
Can I reuse this template for other payers?
The structure works for any payer, but the filing address, deadline, and policy references are specific to Aetna. Check our other templates for payer-specific versions; we have 50+ payer/code combinations in the directory.
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