Official CARC description: “Payment is denied when performed/billed by this type of provider.” Here’s what it actually means, why it fires, and how to get the claim paid.
The payer won't pay this provider TYPE for this service — scope-of-practice edits, supervising-physician rules, or specialty restrictions on certain CPTs.
Liability group: CO = Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.
Also written: CO-170, CO170, “denial code 170”, “170 denial code” or “reason code 170” — same CARC, different ERA formatting.
Check the payer's provider-type policy for the CPT
Incident-to situations: rebill under the supervising physician correctly
Taxonomy wrong: fix enrollment, then reprocess
Contract gap: negotiate the service line addition before rebilling
Appeal with scope-of-practice law and the payer's own provider manual when the type IS eligible. Enrollment-data mismatches reverse readily once the file is fixed.
Fill in the denial facts — use placeholders, never real patient data (the letter keeps [PATIENT NAME]-style fields so you can merge real details privately). A payer-ready draft with an enclosure checklist comes back in ~20 seconds.
Your appeal letter draft will appear here.
The official CARC description for CO 170 is: “Payment is denied when performed/billed by this type of provider.” In practice: The payer won't pay this provider TYPE for this service — scope-of-practice edits, supervising-physician rules, or specialty restrictions on certain CPTs.
Denial code 170 under the CO group (Contractual Obligation) means: Payment is denied when performed/billed by this type of provider. The number is the reason; the CO prefix decides who is liable — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.
Yes. CO 170, CO-170, CO170 and “denial code 170” are the same CARC — clearinghouses, payer portals and PM systems just print it differently. Only the group prefix (CO, PR, OA or PI) changes the meaning, because it changes who has to absorb the amount.
CO stands for Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.
Appeal with scope-of-practice law and the payer's own provider manual when the type IS eligible. Enrollment-data mismatches reverse readily once the file is fixed.