CO-256 Denial Code: Official Description, Causes, and How to Resolve It
The co 256 denial code appears on your 835 Electronic Remittance Advice and Explanation of Benefits as a pairing of two separate code components. CO is the Claim Adjustment Group Code, which X12 defines as Contractual Obligation. The number 256 is the Claim Adjustment Reason Code (CARC), officially defined by X12 as “Service not payable […]
PR-1 Denial Code: Description, Causes, and How to Collect From the Patient
The PR-1 denial code appears on your 835 Electronic Remittance Advice (ERA) and Explanation of Benefits (EOB) as a two-part code. PR stands for Patient Responsibility, which is the Claim Adjustment Group Code. The number 1 is the Claim Adjustment Reason Code (CARC), officially defined by X12 as “Deductible Amount,” making the pr 1 denial […]
CO-18 Denial Code: Official Description, Causes, and Step-by-Step Resolution
The CO-18 denial code appears on your 835 Electronic Remittance Advice and Explanation of Benefits as a pairing of two code components. CO is the Claim Adjustment Group Code, which assigns financial obligation to the provider. The number 18 is the Claim Adjustment Reason Code (CARC), officially defined by X12 as “Exact duplicate claim/service.” X12 […]
