CO-236
Procedure/modifier combination not compatible with another procedure billed same day
What This Code Means
An NCCI edit flagged this procedure/modifier combination as incompatible with another service billed on the same date.
Common Causes
- Two procedures billed together that are mutually exclusive per NCCI
- Modifier used doesn't correctly indicate separate/distinct service
- Column 1/Column 2 code pair billed without required modifier
How to Resolve or Appeal
- Check the NCCI Procedure-to-Procedure edit table for the code pair
- Determine if a modifier (59, XE, XS, XP, XU) legitimately applies
- Resubmit with the correct modifier if the services were truly distinct
- Do not add modifiers solely to bypass an edit without clinical support
Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.