W89Exposure to man-made visible and ultraviolet light

W89 is the ICD-10-CM diagnosis code for exposure to man-made visible and ultraviolet light. It belongs to block W85-W99 (exposure to electric current, radiation and extreme ambient air temperature and pressure) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: W89.0 ((arc)), W89.1 (bed), W89.8 (light) and W89.9 (light).

The conditions in its Excludes2 note aren't part of W89, but may be coded alongside it if the patient has both: exposure to sunlight (X32).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.