CO-213: Physician Self-Referral Prohibition Violation
Self-referral violation. Provider write-off. Appeal with Stark Law exception documentation or restructure the referral.
What Does CO-213 Mean?
CO-213 assigns the self-referral violation to the provider as a contractual write-off. The provider cannot bill the patient for services denied due to self-referral issues. If a Stark Law exception applies, the provider can appeal with compliance documentation. If the violation is genuine, the amount must be written off and the referral arrangement restructured.
CARC 213 is a compliance-focused denial that flags claims where the referring physician may have a financial interest in the entity providing the service. This code is rooted in the Physician Self-Referral Law (Stark Law), which prohibits physicians from referring Medicare patients for designated health services to entities in which they have a financial relationship, unless a specific exception applies.
This denial carries serious implications beyond the immediate revenue loss. A pattern of CARC 213 denials can trigger payer audits, compliance investigations, and potential legal liability under the False Claims Act. The financial relationships that trigger this code include ownership or investment interests in the service entity and compensation arrangements that create referral incentives.
However, Stark Law has numerous exceptions — the in-office ancillary services exception, the fair market value exception, and the electronic health records exception among them. Many CARC 213 denials can be resolved by documenting that a valid exception applies. The key is whether the provider can produce evidence of compliance. Without that documentation, the denial stands and the provider absorbs the full cost.
Common Causes
| Cause | Frequency |
|---|---|
| Physician referring to an entity in which they have a financial interest The referring physician has an ownership or investment interest in the entity that provided the designated health service, which violates the Stark Law (Physician Self-Referral Law) | Most Common |
| Compensation arrangement creating referral incentive A financial relationship between the referring physician and the service provider creates an inappropriate incentive for referrals, violating self-referral regulations | Common |
| Referral pattern violating payer-specific self-referral policy The payer has its own self-referral restrictions that go beyond federal law, and the referral pattern does not comply with these payer-specific policies | Common |
| Missing or inadequate Stark Law exception documentation The referral may qualify for a Stark Law exception, but the provider failed to document or submit evidence of the applicable exception | Common |
| Improper referral relationship documentation The referral relationship between the ordering physician and the rendering entity was not properly documented or disclosed on the claim | Occasional |
How to Resolve
Determine whether a valid Stark Law exception applies to the referral arrangement, document compliance, and appeal with supporting evidence.
- Identify the violation type Determine whether the denial is based on federal Stark Law, state self-referral laws, or payer-specific policy.
- Document Stark Law exception If a valid exception applies, gather all supporting documentation including written agreements, fair market value analyses, and organizational charts.
- Appeal or restructure Submit an appeal with compliance evidence if a valid exception exists. If no exception applies, restructure the referral arrangement and write off the denied amount.
Common RARC Pairings
The RARC code tells you exactly what triggered the CO-213:
| RARC | Description |
|---|---|
| N130 | Consult plan benefit documents or contact the payer for coverage information. Review the payer's self-referral policy → |
| N657 | This claim/service is denied based on the provider's self-referral status. Verify Stark Law compliance and applicable exceptions → |
How to Prevent CO-213
- Educate all physicians on Stark Law prohibitions and available exceptions
- Maintain a compliance program that reviews all referral relationships for financial interest conflicts
- Conduct regular internal audits of referral patterns before claims are submitted
- Keep documented Stark Law exception analyses on file for all arrangements involving financial relationships
- Implement EHR compliance checks that flag referrals to entities with disclosed financial relationships
General Prevention
- Educate all physicians and staff on Stark Law self-referral prohibitions and applicable exceptions
- Establish a comprehensive compliance program that reviews all referral relationships for financial interest conflicts
- Conduct regular internal audits of referral patterns to identify potential self-referral violations before claims are submitted
- Implement EHR and billing software with compliance checks that flag referrals to entities with disclosed financial relationships
- Maintain documented Stark Law exception analyses for all referral arrangements that involve financial relationships
- Stay updated on payer-specific self-referral policies that may be more restrictive than federal law
Also Filed As
The same CARC 213 may appear with different Group Codes:
Related Denial Codes
Sources
- https://www.mdclarity.com/denial-code/213
- https://x12.org/codes/claim-adjustment-reason-codes
- Codes maintained by X12. Visit x12.org for official definitions.