CO-97 — Bundled / Already Adjudicated

CO-97 means the payer considers this service included in a service already billed. In behavioral health, it most commonly occurs when an E/M visit and psychotherapy are billed on the same day without the -25 modifier. The fix is citing CMS NCCI Edit Policy Chapter 11, which explicitly permits same-day E/M + psychotherapy when -25 is applied, plus documentation that the services were separately identifiable.