CO-97 Denial Code: Benefit Included in Payment for Another Service
CO-97 means the benefit for this service is included in the payment or allowance for another service already adjudicated — a bundling denial. It commonly hits E/M visits billed with procedures and services caught by NCCI edits. Appealable when the services were truly distinct and the right modifier supports it.
- Group
- CO — Contractual Obligation
- Category
- Bundling / inclusive services
- Appealable?
- Yes — when services were separate and distinct
- Typical fix
- Correct modifier (25, 59, X-series) and resubmit, or write off if truly bundled
What does denial code CO-97 mean?
CO-97 is a bundling denial. The official X12 text: "The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated." Translation: the payer believes the denied line is part of something else it already paid — a global surgical package, an NCCI column-two code, or an E/M folded into a same-day procedure.
Full guide: CO-97 denial code — complete walkthrough covers NCCI edit lookups, modifier decision trees, and appeal language. This card is the quick reference.
Why does CO-97 happen?
- Global period billing — a post-op visit billed inside the 10- or 90-day global period without modifier 24.
- NCCI pairs — two codes on the same day where one is considered a component of the other.
- E/M with a procedure — office visit billed with a same-day minor procedure without modifier 25.
Mini-example: 99213 ($92) billed with 17110 (wart destruction). The payer pays 17110 and denies the 99213 with CO-97. If the visit addressed the patient's uncontrolled diabetes and the note shows it, modifier 25 recovers that $92; if it was only the wart, the denial is correct.
How do you fix a CO-97?
- Identify what it bundled into — check the paid lines on the same ERA and same date of service.
- Look up the code pair in the NCCI tables; note the modifier indicator (0 = never separately payable, 1 = modifier allowed).
- If distinct and documented, correct the claim with 25, 59, or an X-series modifier and resubmit as a corrected claim.
- If the payer's edit is wrong, appeal with the operative or progress note — the appeal letter generator has a bundling template.
How do you prevent CO-97?
Run claims through a scrubber with current NCCI edits and flag same-day E/M-plus-procedure combos for coder review before submission. Verify unfamiliar bundling denials with the denial code lookup before touching the claim.
Frequently asked questions
No. The CO group code makes it a contractual write-off if the denial stands. Your options are to correct the claim with an appropriate modifier and resubmit, appeal with documentation, or absorb it. Shifting a bundling denial to the patient violates participation agreements.
No, and appending it reflexively is an audit flag. Modifier 59 (or the more specific XE, XS, XP, XU) only applies when the NCCI edit allows a modifier bypass and the documentation shows a genuinely distinct service — different session, site, or encounter. Check the edit's modifier indicator first.
Payers consider a same-day E/M inclusive to a minor procedure unless it was significant and separately identifiable. If the note supports separate work beyond the procedure's usual pre- and post-service care, resubmit with modifier 25 on the E/M.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
Stop losing revenue to problems like this.
A free billing audit shows exactly where your practice is leaking money — no cost, no commitment.
