CARC Code
A1
Non-Specific Denial Requiring Remark Code
The claim or service was denied, but the payer could not identify a more specific reason code. Additional explanation must be provided through a separate remark code on the remittance advice.
contractualHow to resolve this denial
▶✓ Pre-action checklist — verify before contacting the payer
Review the full remittance advice (ERA/EOB) for additional RARC codes that explain the denial.
Verify the claim was submitted with correct patient eligibility and benefit information.
Check if this denial applies to a specific line item or the entire claim.
▶More about CO-A1 — stats, related codes, appeal template
85%
Recovery Rate
3-7 days
Avg. Resolution
Easy
Difficulty
Rare
Frequency
Payer-Specific Notes
How major payers handle CARC A1 by specialty.
General
Confirm payer-specific policy for CARC A1 and submit corrected claim or appeal as appropriate.
Common 835 Combinations
CARC A1 most often appears with these Group Code + RARC combinations on 835 remittances.
Appeal Letter Template
Generic appeal template for CARC A1 denials.
Dear [Payer Name] Appeals Department, We are writing to appeal the denial of claim [CLAIM #] for patient [PATIENT NAME] (Member ID: [ID]) for services rendered on [DATE OF SERVICE]. The claim was denied with CARC A1: "Claim/Service denied." We believe this denial is in error for the following reasons: [INSERT CLINICAL/ADMINISTRATIVE JUSTIFICATION] We respectfully request reconsideration and payment of this claim. Sincerely, [Provider Name / Billing Contact]
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