Q: An L&I billing item was denied with the message: M18 DENIED. PLEASE SUBMIT THE APPROPRIATE ICD CODE SET (ICD-9 OR ICD-10) BASED ON THE DATE OF SERVICE PROVIDED. How should I resolve this?
A: The service being billed (e.g., Work Evaluation or Non-Vocational Testing) requires a Diagnosis Code to be paid that was not included in the invoice. The service must be configured as requiring the diagnosis for billing by checking the appropriate check-box in the Service Basic Info screen. The L&I invoice will then include the diagnosis code and warn you if the claim does not have a valid diagnosis to include (in which case you may need to add one).