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183
CO - Contractual ObligationCoding/Billing
Denial Code CO-183: Revenue Code Invalid on Date of Service
What Does Code 183 Mean?
The revenue code is not valid for the date of service. Common on facility (UB-04) claims when the revenue code has been retired or is not yet effective.
Group Code CO (Contractual Obligation): The provider has agreed to accept the payer's determination. The patient is generally not responsible for this amount.
Why Does This Happen?
Using an outdated or incorrect revenue code on a facility claim.
How to Resolve It
- 1Verify the correct revenue code for the date of service
- 2Update to the current revenue code
- 3Resubmit the corrected institutional claim
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