Healthcare Error Code
Healthcare Insurance / Medical Billing
Claim Adjustment Reason Codes (CARC)
CO-133 | Incorrect provider type
Industry
Healthcare
Canonical
/healthcare/error-codes/co-133/
Last Updated
Feb 25, 2026
Summary
This code indicates that the provider type submitted does not match payer requirements for the service.
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What This Code Means
CO-133 is applied when the provider type reported is not eligible to bill for the service under payer rules. Provider eligibility is defined by enrollment and scope of practice. This is an administrative validation issue rather than a coverage decision. The service itself may be valid but billed under an ineligible provider type.
Where Users Usually See This Code
- Remittance advice
- Claim rejection notices
- Provider enrollment reports
Why This Code Appears
- Provider type not eligible for service
- Enrollment records not updated
- Payer provider rules enforced
What Typically Happens Next
- Claim is denied or adjusted
- Reprocessing may be required
- Payment is delayed or not issued
What This Code Is Not
- It is not a non-covered service
- It is not patient responsibility
- It is not a duplicate claim
Troubleshooting Checklist
- □ Verify provider enrollment details
- □ Review payer provider eligibility rules
- □ Monitor enrollment status
Notes And Edge Cases
Provider eligibility rules vary by payer and program. Enrollment updates can affect provider type recognition.
Related Codes
8 links
- CO-109 CodeClaim not covered by this payer
- M51 CodeMissing/incomplete provider information
- CO-54 CodeMultiple physicians not allowed
- CO-62 CodeNot covered for place of service
- CO-11 CodeDiagnosis inconsistent with procedure
- CO-61 CodeProcedure not covered for age
- CO-65 CodeProcedure code invalid
- CO-128 CodeInvalid billing modifier
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