Quick Explanation
Denial code CO-92 indicates that a medical claim was rejected because it is missing a required signature from either the rendering provider or the patient. Payers require these signatures, or verified electronic equivalents, on claim forms like the CMS-1500 to validate the services rendered, authorize the release of information, and assign insurance benefits.
Common Causes for CO-92
Denials with code CO-92 typically happen for the following specific reasons:
- Box 31 on the CMS-1500 form was left blank, missing the rendering provider's signature, name, or credentials.
- Box 12 (Patient's or Authorized Person's Signature) or Box 13 (Insured's or Authorized Person's Signature) was left blank without a valid 'Signature on File' (SOF) indicator.
- Electronic data transmission failed to populate the mandatory signature indicator flags in the EDI 837 claim format.
- The patient intake documentation was not completed, resulting in a lack of authorization for the release of information and assignment of benefits.
How to Prevent CO-92 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Configure the Practice Management (PM) system to automatically populate 'Signature on File' or 'SOF' in Box 12 and Box 13 once patient intake forms are completed.
- Implement claim scrubber rules that prevent submission of claims where Box 31 or the provider signature electronic equivalent is missing or null.
- Ensure all electronic data interchange (EDI) mapping configurations correctly capture and transmit provider signature certification indicators.
- Conduct regular audits of patient intake workflows to guarantee signed authorization forms are scanned and stored prior to billing.
Appeal Letter Template for CO-92
If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.
[Your Practice Header]
[Date]
[Payer Name]
[Appeals Department Address]
RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO-92 - Claim was denied due to absence of signature
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-92: "Claim was denied due to absence of signature".
We are appealing the denial of this claim (Denial Code CO-92) regarding an absent signature. Enclosed, please find the patient's signed and dated assignment of benefits and medical release authorization form, establishing that 'Signature on File' was legally active at the time of service. Furthermore, we have enclosed the complete, certified medical record which contains the rendering provider's electronic signature, satisfying CMS Medicare Claims Processing Manual, Chapter 1, Section 50.1.3 guidelines for electronic signature authentication. We request that this claim be reprocessed and paid in full without further delay.
Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].
We respectfully request that you reprocess this claim for payment.
Sincerely,
[Your Name]
[Title]
[Practice Name]
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