DFDenialFix Desk

BCBS denial code guide

BCBS CO-302 Denial Code — Authorization or notification time limit expired

What BCBS CO-302 means, why it happens, corrected claim vs appeal steps, evidence checklist, and RARC clues for providers.

Fast answer: CO-302 is commonly used when the payer indicates authorization or notification time limit expired. For BCBS-related claims, read the paired RARC and plan-specific EOB text before choosing corrected claim, appeal, COB update, or payment dispute.

What CO-302 usually means on a BCBS denial

CO-302 is the search phrase many billers use, but the CARC number, group code, RARC, and EOB wording all matter. The same CARC can point to different next actions depending on whether the line is contractual obligation, patient responsibility, other adjustment, or a payer-requested correction.

For BCBS claims, also identify whether this is a local Blue plan claim, an out-of-area BlueCard claim, a carved-out benefit, a secondary claim, or a plan-specific medical policy issue. That context prevents wrong-channel appeals and duplicate resubmissions.

Recommended first action

Authorization audit first; appeal when authorization existed, was not required, or payer applied it incorrectly.

Common causes

  • Authorization, precertification, notification, referral, or pre-treatment was absent or exceeded.
  • The authorization number exists but does not match the billed provider, service, date, units, or location.
  • A referral was absent, expired, or exceeded under a network or PCP rule.
  • Authorization was obtained through a vendor but not reflected on the claim or local Blue plan record.

Step-by-step fix workflow

  1. Locate the exact authorization/referral requirement for the member plan and service type.
  2. Match the auth record to claim fields: member, CPT/HCPCS, diagnosis, provider, facility, dates, units, and place of service.
  3. If the auth was omitted from the claim, follow corrected-claim rules and include the authorization number.
  4. If the auth existed but was misapplied, appeal with screenshots, approval letter, call reference, and timeline.
  5. For BlueCard claims, confirm whether the local/host plan or member/home plan handled the authorization workflow.

Evidence checklist

  • Authorization approval
  • Referral record
  • Portal screenshot
  • Call reference number
  • Claim image
  • Medical records if clinical criteria are disputed

What not to do

  • Do not submit an appeal before matching units and dates.
  • Do not assume retro-authorization is allowed.
  • Do not ignore vendor authorization records.

Appeal or corrected claim wording

Use a short, evidence-led narrative:

We are requesting review of claim [claim number], DOS [date], denied with CO-302. The attached documentation shows [specific fact]. Based on the plan rule and records, the service should be reprocessed because [one-sentence reason]. Please reprocess the line or provide the exact policy basis for maintaining the denial.

Related codes and RARCs

CO-15CO-39CO-197CO-198CO-210CO-243CO-284CO-287

FAQ

Is BCBS CO-302 always an appeal?

No. Match the authorization record to the member, provider, service, location, date span, units, and billed code. The correct action depends on the group code, RARC, EOB text, plan rule, and whether the claim data was originally correct.

What should I check first for CO-302?

Start with the line-level ERA/EOB details: group code, CARC, RARC, claim number, service line, CPT/HCPCS, modifier, date of service, provider identifiers, and payer note.

Can I resubmit the same claim after CO-302?

Only when the plan specifically asks for resubmission. Most repeat denials happen when the second claim does not change the exact field, document, or evidence that triggered the first denial.

What evidence helps overturn CO-302?

The strongest packet usually includes Authorization approval, Referral record, Portal screenshot, Call reference number, plus a short explanation tied to the denial reason.