CO-9774% overturn rate across surgical specialties
The benefit for this service is included in another service
Payment is bundled into the primary procedure allowance under NCCI or payer payment policy edits.
Is this code appealable?
Yes, Highly Appealable
Appealable when documentation demonstrates a distinct, separately identifiable procedural service or anatomic site.
Plain Language Meaning
What CO-97 actually means
The insurance company bundled this service into another procedure performed on the same day, claiming it was included in the base fee.
Upstream Prevention Strategy:
Pre-bill NCCI unbundling rules and automated modifier eligibility checks.
Underlying Root Causes
Why payers issue CO-97
01. NCCI Procedure-to-Procedure (PTP) edit triggered without appropriate modifier (e.g. 59, XS, XE)
02. Evaluation and Management (E/M) service billed on the same day as a minor surgical procedure without modifier 25
03. Post-operative global period overlap
Clinical Dispute Strategy
How to appeal CO-97 and win
Provide operative notes highlighting separate incision/anatomic site, separate organ system, or distinct time window; cite CMS NCCI manual chapter guidelines.
Mandatory Attachment Checklist
- •Operative report with highlighted anatomical distinction
- •Chart notes with timestamps
- •NCCI manual page citation
Common Mistakes That Cause Upholds
- •Adding modifier 59 indiscriminately without documentation proof in operative notes
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