co-197
CO-197 is a claim adjustment code that pairs the group code CO (Contractual Obligations) with reason code 197: precertification, authorization, or notification absent. It means the payer denied the service because required prior approval was not obtained.
What is the CO-197 denial code?
CO-197 is a denial that shows up on a payer's remittance. It combines the group code CO, meaning Contractual Obligations, with Claim Adjustment Reason Code 197, which states that precertification, authorization, notification, or pre-treatment was absent. In plain terms, the service needed prior approval and the provider did not obtain it.
Because the denial carries the CO group code, the payer is saying the loss is the provider's under the contract. The patient usually cannot be balance-billed for a CO-197 line; the center must correct the issue and, where possible, pursue a retro-authorization or appeal.
Why does CO-197 matter for surgery centers?
Prior authorization denials like CO-197 are a leading source of preventable lost revenue for surgical practices, because the procedure has already been performed by the time the denial arrives. Recovering the payment, if it is recoverable at all, takes staff time on appeals and peer-to-peer reviews.
The reliable fix is upstream: verifying that each payer's authorization requirement is met and documented before the case is scheduled. A surgery center that prevents CO-197 at intake protects both its clean-claim rate and its cash flow.
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