CO-236: Procedure Not Paid Separately
This procedure or procedure/modifier combination is not paid separately. The service is considered incidental to or included in another procedure.
Why Claims Get Denied with CO-236
Denial code CO-236 is triggered when this procedure or procedure/modifier combination is not paid separately. the service is considered incidental to or included in another procedure. Understanding the root causes helps prevent future denials and strengthens your appeal when one occurs.
Incidental procedure performed during a primary surgery
Add-on code billed without the required primary code
Service is column 2 of a CCI edit pair without an allowed modifier
Global surgical package includes the billed service
How to Appeal CO-236
If the procedure was truly distinct and separately identifiable, resubmit with appropriate modifier (59, XE, XS, XP, XU) and documentation. Review CCI edits to confirm whether a modifier override is permitted for the code pair.
Documentation Required for Appeal
A successful appeal of CO-236 requires thorough documentation. Gather these items before drafting your appeal letter:
Operative report documenting distinct procedures
CCI edit reference for the code pair
Separate documentation for each procedure
Modifier justification
How to Prevent CO-236 Denials
Check CCI edits and NCCI guidelines before billing multiple procedures. Verify add-on code requirements. Understand global surgical period inclusions for each procedure.
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