CO-B11: Claim Transferred to Proper Payer — Not Covered Here
CO-B11 means the claim was sent to the wrong payer and transferred. Track it with the correct payer and update your records.
What Does CO-B11 Mean?
When paired with Group Code CO, this payer is informing you the claim has been transferred and is not their responsibility. Track the claim with the receiving payer.
CARC B11 indicates the payer received the claim but determined it is not the correct payer for this patient or service. The payer transferred the claim to what it identified as the proper payer for processing. This is a routing issue — the claim was sent to the wrong destination.
Common causes include submitting to a payer where the patient's coverage has terminated, incorrect Medicare Secondary Payer routing, outdated insurance information, or simple claim submission errors. The payer may have automatically forwarded the claim, or it may simply be informing you that the claim needs to go elsewhere.
The primary action is to verify the patient's current insurance information and ensure the claim reaches the correct payer. If the payer says it transferred the claim, follow up with the receiving payer to confirm it was received and is being processed.
Common Causes
| Cause | Frequency |
|---|---|
| Claim submitted to wrong payer The claim was submitted to a payer that does not cover the patient, and the payer transferred it to what they identified as the correct payer/processor | Most Common |
| Coverage terminated with this payer The patient's coverage with this payer ended before the date of service, and the claim was forwarded to the correct payer | Common |
| Medicare Secondary Payer routing Medicare determined it is the secondary payer and transferred the claim to the primary payer for processing | Common |
| Incorrect insurance information on file The provider had outdated insurance information and submitted to the wrong payer | Common |
How to Resolve
- Verify correct payer Confirm the patient's current insurance and the correct payer.
- Contact receiving payer Track the transferred claim with the correct payer.
- Resubmit if needed If not automatically transferred, submit directly to the correct payer.
- Update records Correct the patient's insurance information in your system.
Appeal if this payer should be covering the service. Include the patient's insurance card, eligibility verification showing active coverage with this payer on the date of service, and any prior claim payment history from this payer.
Common RARC Pairings
The RARC code tells you exactly what triggered the CO-B11:
| RARC | Description |
|---|---|
| N527 | Payment has been issued to another plan/entity for this claim. Contact the receiving payer to track the transferred claim → |
| N381 | Alert: Consult your contractual agreement for restrictions, billing, and payment information. Review your agreement with this payer to understand the transfer reason → |
How to Prevent CO-B11
- Verify patient insurance eligibility and the correct payer before claim submission
- Use real-time eligibility tools to confirm active coverage and the correct payer ID
- Update insurance information at every patient encounter
- Implement claim routing rules that direct claims to the correct payer based on eligibility checks
- Maintain accurate payer information in the practice management system
Also Filed As
The same CARC B11 may appear with different Group Codes:
Related Denial Codes
Sources
- https://x12.org/codes/claim-adjustment-reason-codes
- https://www.mdclarity.com/denial-code/b11
- https://www.cms.gov/regulations-and-guidance/guidance/manuals
- Codes maintained by X12. Visit x12.org for official definitions.