CO-170CO group · Credentialing

CO-170 denial code: payment denied for this type of provider

CO-170 is a plan design statement about who it pays, and it collides most often with the way modern practices actually staff.

CO-170 fires where a plan does not recognise the provider type for the service billed. It applies to non-physician practitioners, allied health disciplines and provider categories a plan chooses not to reimburse directly.

What CO-170 means

The important distinction is between a plan that will not pay this provider type at all and a plan that will pay only under supervision or incident to a physician's service. The second is a billing-configuration question with a clear answer; the first is a benefit-design argument. Which one you have determines whether this is fixable this week or a contracting conversation.

Why CO-170 fires

  • The plan does not recognise the provider type for direct reimbursement.
  • The service requires supervision and was billed independently.
  • The provider type is recognised for other services but not this one.
  • State scope of practice permits the service and the plan's policy has not kept up.

Is CO-170 worth appealing?

Sometimes worth appealing

Establish whether the type is excluded outright or merely restricted. Where supervision or incident-to billing would make it payable, that is a configuration fix; where the type is excluded, it is a contracting matter.

How to resolve or appeal CO-170

  1. 1

    Read the plan's provider-type policy

    Whether the exclusion is absolute or conditional.

  2. 2

    Check the supervision route

    Many services are payable when billed correctly under supervision.

  3. 3

    Raise scope where state law is broader

    A policy narrower than state licensure is worth challenging, though slowly.

CO-170 — frequently asked

Is this about credentialing?
Adjacent but distinct. The provider may be fully credentialed and still be a type the plan does not pay for this service.
Does state law override the plan?
Sometimes. Several states require plans to reimburse services within a licensed practitioner's scope, and that is the strongest form of this argument.

Related guides

CO-171 · CredentialingCO-8 · CredentialingCO-185 · Credentialing

Sources

Reason-code meanings are paraphrased from the X12 Claim Adjustment Reason Code list for plain-language reference; they are not reproduced verbatim. This is general information, not legal, coding, or medical advice — always confirm against the payer's remittance and policy.

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