CO-170 Denial Code: Not Payable When Billed by This Provider Type
Payers restrict some services to certain provider types or specialties. The payer compares the rendering provider's enrolled specialty and taxonomy with its rules for the procedure. If they do not match, the claim denies with CARC 170, even if the provider is licensed to perform the service.
The group code (CO, PR, OA, PI) tells you who is responsible. The CARC number tells you why.
CO-170 means the payer does not pay for this service when it is billed by this type of provider. The cause is usually a credentialing or taxonomy problem: the rendering provider is enrolled under a specialty the payer does not allow for that code. Check the provider's enrollment record before resubmitting.
Common causes of CO-170.
- Provider enrolled with the payer under the wrong specialty or taxonomy
- Taxonomy on the claim does not match the enrollment record
- Service restricted to specific license types (for example, some psychological testing codes)
- Mid-level provider billing a service the payer only pays to physicians
- New provider not yet fully credentialed for the service
How to work a CO-170 denial.
The order matters: confirm the facts before deciding between a corrected claim, a reconsideration, or an adjustment.
- 1Check the rendering provider's enrollment record with the payer, including specialty and taxonomy.
- 2Compare it with the payer's policy for which provider types can bill the service.
- 3If the claim data was wrong, correct the taxonomy or rendering provider and resubmit.
- 4If the enrollment is wrong, update it with the payer, then resubmit once it is effective.
- 5Only bill under a different provider if the payer's supervision or incident-to rules truly allow it.
How to keep CO-170 from coming back.
- Keep enrollment specialty and taxonomy consistent across payers
- Verify payer rules for new service lines before scheduling
- Track credentialing status for every new provider by payer
Fixing this at the source usually sits with provider credentialing →
Questions about CO-170.
Denials that often travel with this one.
CO-96: Non-Covered Charge
CO-96 means the payer considers the service a non-covered charge. How to read the RARC, verify benefits, and decide whether to appeal or bill the patient.
Read about CO-96 →CO-16: Claim Lacks Information or Has Billing Errors
CO-16 means the claim is missing information or has a billing error. How to use the RARC to find what is missing, correct it, and stop it from recurring.
Read about CO-16 →CO-109: Claim Not Covered by This Payer
CO-109 means the claim was sent to the wrong payer or contractor. How to identify the correct payer, including carve-outs and Medicare Advantage, and rebill.
Read about CO-109 →Add a Dedicated Denial Specialist
RCM Staff places trained denial management specialists inside your EHR and clearinghouse to work the queue, correct and appeal claims, and track root causes by payer.
Kevin Jamito has 18+ years of U.S. healthcare revenue cycle management experience across billing, coding, practice management, and offshore RCM operations. He founded RCM Staff to give U.S. healthcare teams dedicated Philippines-based specialists who work inside their existing systems.