CARC 170: Payment Denied - Provider Type Not Eligible for This Service

What it means

The payer is saying that the specific type of provider who performed or billed for this service is not eligible to be reimbursed for it under the patient's plan. This isn't about the service itself being invalid, but about who delivered it. Certain payers restrict specific procedures or services to particular provider specialties, licensure levels, or credential types.

Common causes

The rendering provider's specialty or credential type is not recognized by the payer for this specific service or procedure code
The service was billed by a mid-level provider (e.g., NP, PA) when the payer requires a physician for that code
Provider enrollment or credentialing with the payer does not include authorization for this service type
The provider's taxonomy code on the claim does not match an eligible category for the billed CPT/HCPCS code
State scope-of-practice rules restrict certain services to specific provider types, and the payer enforces this
Incorrect provider type was listed on the claim due to a data entry or system error

How to fix it

Review the payer's coverage policy for the specific CPT/HCPCS code to confirm which provider types are eligible to bill it
Verify the rendering provider's taxonomy code and specialty designation on file with the payer are accurate
Confirm the provider is properly credentialed and enrolled with the payer for the service line in question
If billed incorrectly, correct the provider information (rendering, supervising, or billing provider) and resubmit the claim
If the provider type is accurate and should be eligible, contact the payer for clarification on their policy
Check whether the service should have been billed under a supervising physician's NPI per incident-to rules

Appeal / resubmit

If you believe the denial was issued in error, gather documentation showing the provider's credentials, license, and scope of practice, along with the payer's own provider manual or policy language that supports eligibility. Submit a written appeal referencing the specific plan policy section. If the service was performed under appropriate supervision (e.g., incident-to billing), include supporting documentation of the supervising provider's involvement. Appeals are more likely to be reviewed favorably when payer policy is ambiguous or was recently updated.

Related codes

Frequently asked

Does this mean the service itself was not covered?

Not necessarily. This denial is specifically about the provider type who billed or performed the service, not about whether the service is a covered benefit.

Can I just rebill under a different provider?

Only if the service was actually performed or supervised by an eligible provider type per payer rules and applicable state law. Rebilling under an incorrect provider is not appropriate.

How do I know which provider types are eligible for a given code?

Check the payer's provider manual, medical policy documents, or contact provider services, since eligibility rules vary by payer and by state.

More free billing tools: all denial codes · denial lookup · Medicare fee calculator

This content is informational only and does not constitute billing or legal advice. Always verify current requirements with the specific payer.