Healthcare Error Code
Healthcare Insurance / Medical Billing
Claim Adjustment Reason Codes (CARC)
CO-131 | Claim-specific negotiated discount
Industry
Healthcare
Canonical
/healthcare/error-codes/co-131/
Last Updated
Feb 25, 2026
Summary
This code indicates that a negotiated discount was applied to the claim.
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What This Code Means
CO-131 is used when a payer applies a specific negotiated discount to a claim. This reflects contractual arrangements between the payer and provider. It is not a denial or billing error. The discount adjusts payment to agreed terms. Patient responsibility is typically not affected.
Where Users Usually See This Code
- Remittance advice
- Contractual adjustment summaries
- EOB explanations
Why This Code Appears
- Negotiated pricing agreements apply
- Claim-specific discount terms enforced
- Contractual provisions activated
What Typically Happens Next
- Payment is adjusted
- Claim processing completes
- Balances are reconciled
What This Code Is Not
- It is not a coverage denial
- It is not patient responsibility
- It is not a documentation error
Troubleshooting Checklist
- □ Review contract terms
- □ Monitor discount application
- □ Reconcile adjustments
Notes And Edge Cases
Discounts may vary by service or contract. Some discounts apply automatically based on claim attributes.
Related Codes
8 links
- CO-151 CodePayment adjusted due to contractual agreement
- CO-45 CodeCharge exceeds fee schedule
- CO-33 CodeInsufficient documentation
- CO-109 CodeClaim not covered by this payer
- CO-29 CodeTime limit expired
- CO-52 CodeMissing provider signature
- CO-125 CodeSubmission/billing error
- CO-54 CodeMultiple physicians not allowed
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