Answer-first denial workflows
Every guide starts with the likely root cause, then gives corrected-claim, appeal, documentation, COB, authorization, or payment-dispute steps in a short provider workflow.
BCBS denial code lookup for providers
BCBS Denial Code Lookup and Appeal Workflows
Search common BCBS denial codes, CARCs and RARCs. Get plain-language next steps for corrected claims, appeals, COB updates, prior authorization fixes, records requests and payment disputes.
Use this before you appeal
- Read group code + CARC + RARC.
- Find the plan-specific rule.
- Choose corrected claim, appeal, document response, COB update, or payment dispute.
- Attach proof, not a generic template.
Most searched BCBS denial codes
CO-16Claim or service lacks information or has billing errorsCO-197Precertification, authorization, notification, or pre-treatment absentCO-29Time limit for filing has expiredCO-50Service not deemed medically necessary by payerCO-96Non-covered chargesCO-97Benefit included in payment for another serviceCO-45Charge exceeds fee schedule or contracted allowanceCO-22Care may be covered by another payer under COBCO-18Exact duplicate claim or serviceCO-109Claim or service not covered by this payerCO-252Attachment or documentation required to adjudicate claimCO-236Procedure or modifier combination incompatible with another same-day service
Denial categories
Prior authorization denialsBCBS prior authorization denial workflows for absent, exceeded, expired, or mismatched authorization and referral issues.Timely filing denialsBCBS timely filing denial workflows, evidence checklists, accepted submission proof, and CO-29 appeal support.Medical necessity denialsBCBS medical necessity appeal workflows for policy criteria, clinical records, and provider letters.Coordination of benefits denialsBCBS COB denial workflows for primary EOBs, Medicare crossover, payer order, and member COB updates.Eligibility and member ID denialsBCBS eligibility denial workflows for member ID, coverage dates, dependent status, and wrong-payer claim routing.Documentation and attachment denialsBCBS record request and attachment-required denial workflows with proof of submission and document packet indexing.Coding, modifier and bundling denialsBCBS coding denial workflows for modifiers, bundled services, revenue code edits, and incompatible procedures.Payment disputes and contractual adjustmentsBCBS payment dispute workflows for CO-45, underpayments, contractual adjustments, and fee schedule issues.
Official source checks
Use the source method page to verify CARC/RARC language and plan-specific BCBS rules before filing appeals or corrected claims.
See source method