10/12/2026
CO-97 denials often signal that a service was bundled under an NCCI edit or the global surgical package.
Start by reading the full remit line, including CARC 97 and the RARC. N19 or M15 points to NCCI-style bundling, while M144 points to global-package bundling. Then check the procedure pair in the current quarter’s CMS NCCI files. Indicator 1 may support modifier 59 or an X modifier when documentation proves distinctness. Indicator 0 means the bundling is correct and should be written off.
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https://www.verimedix.com/co-97-denial-code-bundled-service/