Is W99 a billable code?
No. W99 is a header code that groups 0 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
W99: Exposure to other man-made environmental factors
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
W99 groups related diagnoses under exposure to other man-made environmental factors. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
W99 questions
What does W99 mean?
W99 is the ICD-10-CM code for Exposure to other man-made environmental factors. It is in chapter 21, External causes of morbidity (V00-Y99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.