CO-197: Preauthorization absent
Triage: Correct and resubmit
By Dr. Daniel Turner, DC · Reviewed September 2, 2026
What does denial code CO-197 mean?
The service required prior authorization and the payer found none on file.
What does CO-197 usually mean in a chiropractic office?
Common with plans that route chiropractic through a benefits manager where visits beyond an initial allowance need authorization. The auth often exists and simply never made it onto the claim.
How do you fix a CO-197 denial?
- If an auth exists, add the authorization number to the claim and resubmit.
- If no auth was obtained, request retroactive authorization from the payer; many benefit managers allow a window.
- Fix the intake step so auth requirements are caught at eligibility, before the first visit.
What this looks like in practice
A patient with a managed chiropractic benefit uses their initial allowed visits, and visit seven requires an authorization the front desk never requested. Three claims go out before the first CO-197 lands. The authorization is granted retroactively, the claims are resubmitted with the auth number, and everything pays, minus three weeks of delay that a pre visit check would have avoided.
How to stop it from happening again
- ✓Capture preauthorization requirements during eligibility, before the first visit
- ✓Track visit counts against authorized allowances so the renewal request goes out before the visit that needs it
- ✓Record auth numbers on the case so they flow onto claims automatically
Appeal language that works for CO-197
A starting paragraph in the wording reviewers expect. Replace the bracketed pieces with the claim's own facts and attach the records it references.
How Cervica handles CO-197
Eligibility checks flag preauthorization requirements before the visit, and a CO-197 denial routes to Correct and resubmit with the auth attachment step queued.
Quick answers
What does denial code CO-197 mean?
The service required prior authorization and the payer found none on file.
What does CO-197 usually mean in a chiropractic office?
Common with plans that route chiropractic through a benefits manager where visits beyond an initial allowance need authorization. The auth often exists and simply never made it onto the claim.
How do you fix a CO-197 denial?
If an auth exists, add the authorization number to the claim and resubmit. If no auth was obtained, request retroactive authorization from the payer; many benefit managers allow a window. Fix the intake step so auth requirements are caught at eligibility, before the first visit.
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.