PR-170 / CO-170: Not paid to this type of provider
Triage: Patient responsibility with waiver, or write off
By Dr. Daniel Turner, DC · Reviewed September 2, 2026
What does denial code PR-170 / CO-170 mean?
The plan does not pay a chiropractor for this particular service. The provider type wall does not move, so resubmitting the same claim is pointless.
What does PR-170 / CO-170 usually mean in a chiropractic office?
Classic examples: plans that cover CMT from a DC but not exams, X-rays, or therapies. With a proper waiver on file the PR version is patient billable. The CO version means the payer holds the provider responsible, usually because no valid waiver existed.
How do you fix a PR-170 / CO-170 denial?
- Do not rebill as is; the denial will repeat.
- With a compliant waiver on file, bill the patient for the PR amount.
- Without one, write off the CO amount and fix the intake waiver process going forward.
What this looks like in practice
A Medicare patient receives an adjustment, an exam, and electrical stimulation. Medicare pays the CMT line and denies the exam and the therapy with 170 style provider type logic, because Medicare pays chiropractors for spinal manipulation and nothing else. With a proper notice on file the excluded services are billable to the patient at the practice’s rate; without one, they are the practice’s loss.
What the authorities say
Medicare’s coverage of chiropractors extends only to manual manipulation of the spine to correct a subluxation, per the Benefit Policy Manual, Chapter 15, section 240. Exams, X-rays, and therapies furnished by a chiropractor are statutorily excluded, which is why they deny regardless of documentation quality.
How to stop it from happening again
- ✓Know which services each plan pays a DC for before the visit, not on the remittance
- ✓For Medicare, set expectations and capture notices for always excluded services at intake
- ✓Do not rebill provider type denials; the wall does not move, and duplicates just age your AR
How Cervica handles PR-170 / CO-170
Cervica distinguishes the PR and CO versions in the worklist so staff bill or write off correctly, and the intake flow captures the waivers that make these balances collectible.
Related codes
Quick answers
What does denial code PR-170 / CO-170 mean?
The plan does not pay a chiropractor for this particular service. The provider type wall does not move, so resubmitting the same claim is pointless.
What does PR-170 / CO-170 usually mean in a chiropractic office?
Classic examples: plans that cover CMT from a DC but not exams, X-rays, or therapies. With a proper waiver on file the PR version is patient billable. The CO version means the payer holds the provider responsible, usually because no valid waiver existed.
How do you fix a PR-170 / CO-170 denial?
Do not rebill as is; the denial will repeat. With a compliant waiver on file, bill the patient for the PR amount. Without one, write off the CO amount and fix the intake waiver process going forward.
References
General information for billing teams, not legal or payer specific advice. CARC definitions belong to X12; payer policies vary and control. Verify against the payer contract before acting on any individual claim.