Category summary: The question is whether the billed code combination is inherently bundled or whether documentation supports a distinct, separately payable service.
Top codes in this category
CO-4Modifier/procedure mismatchCO-5Procedure or bill type inconsistent with place of serviceCO-11Diagnosis inconsistent with procedureCO-54Multiple physicians or assistants not covered in this caseCO-58Invalid or inappropriate place of serviceCO-59Processed under multiple or concurrent procedure rulesCO-60Outpatient services not covered near inpatient servicesCO-97Benefit included in payment for another serviceCO-146Diagnosis invalid for date of serviceCO-181Procedure code invalid on date of serviceCO-182Procedure modifier invalid on date of serviceCO-189Unlisted/NOC procedure billed when a specific code existsCO-199Revenue code and procedure code do not matchCO-231Mutually exclusive procedures on same day or settingCO-234Procedure is not paid separatelyCO-236Procedure or modifier combination incompatible with another same-day serviceCO-282Procedure/revenue code inconsistent with type of billCO-306Type of bill inconsistent with patient status
How to work these denials
- Identify the paid anchor service and the denied bundled or incompatible line.
- Review CPT/HCPCS, revenue code, modifiers, diagnosis pointer, place of service, and same-day services.
- Confirm whether a distinct service is documented in the operative note, encounter note, or test report.
- Submit a corrected claim if the original claim missed a supported modifier or code.
- Appeal or dispute only with a specific coding-policy rationale and supporting documentation.
Evidence checklist
- Line-level ERA/EOB
- Procedure or encounter note
- Coding rationale
- Modifier support
- Payer policy or edit reference
- Corrected claim notes