Denial Code CO-183: Description, Meaning and How to Fix It
The referring provider on the claim is not eligible to make the referral.
Official description
The referring provider is not eligible to refer the service billed.
Common cause
Wrong referring provider, or one not enrolled/eligible with the payer.
How to fix it
Correct the referring provider information and confirm their eligibility, then resubmit.
Related denial codes
- CO-45: The amount billed is higher than the payer's contracted (allowed) rate. The difference is a contractual write-off, not a patient balance.
- CO-16: The claim is missing required information or has an error. It is almost always paired with a RARC that names the specific missing field.
- CO-97: This service is bundled into another service that was already paid, so it is not paid separately.
- CO-18: The payer received this exact claim/service already.
- CO-22: Another insurer should be billed first under coordination of benefits.
- CO-29: The claim was submitted after the payer's filing deadline.