236Denial Code (CARC)Active
CO 236 Denial Code - Fix Incompatible Procedure Issues
Code 236 indicates that a procedure or procedure/modifier combination billed is incompatible with another procedure or procedure/modifier combination on the same claim. This is based on the National Correct Coding Initiative (NCCI) or specific workers' compensation state regulations and fee schedules.
Who Pays: Group Code Liability
For code 236, the group code is typically CO, meaning the provider must write off the amount and cannot bill the patient. However, verify with the payer as some workers' compensation cases might differ.
Why Claims Get Code 236
- A procedure and modifier combination was billed that conflicts with another procedure on the same date of service.
- The NCCI edits identified a conflict between two billed services.
- State-specific workers' compensation rules were not followed for procedure combinations.
- A modifier intended to bypass an edit was omitted or incorrectly applied.
- Billing two services together that are not allowed under the payer's guidelines.
How to Fix & Resubmit
- Review the NCCI edits or state workers' compensation regulations relevant to the procedures billed.
- Verify if a modifier could appropriately bypass the NCCI edit and add it if applicable.
- Correct any modifier errors or omissions and resubmit the claim if necessary.
- If procedures are inherently incompatible, remove one and adjust the claim accordingly.
- Contact the payer for clarification if the denial seems incorrect, especially under state-specific rules.
Corrected Claim or Appeal?
Submit a corrected claim if a modifier was missed or misapplied. Appeal if documentation supports the billed combination and the payer's denial seems incorrect under their policy.
Preventing Future 236 Denials
- Use NCCI edit tools during claim preparation to catch incompatible procedure combinations before submission.
- Regularly update billing software and staff training to align with the latest NCCI and state-specific guidelines.
- Implement a review step for claims with multiple procedures on the same day to ensure compatibility.
- Educate billing staff on the proper use of modifiers to override NCCI edits when justified.