Exposure to other nonionizing radiation (W90)
This section covers ICD-10 codes used to classify different types of **exposure to nonionizing radiation**, including radiofrequency, infrared, laser, and other nonionizing rays. These codes help specify the nature and timing; initial, subsequent, or sequela; of such exposures.
The primary code W90 and its subcodes indicate various forms of nonionizing radiation exposure. For instance, W90.0XXA corresponds to an initial encounter for exposure to radiofrequency radiation, commonly referred to as overexposure to radar or radiopharmaceutical radiation. Codes like W90.1XXA identify initial exposures to infrared radiation, which may be linked to conditions such as poikiloderma from infrared lamps. Exposure to laser radiation, including injuries or complications like retinal light toxicity or laser-induced skin changes, is encoded under W90.2XXA. The section also includes codes for other nonionizing radiation exposures like microwaves and ultraviolet light under W90.8XXA, associated with complications such as radiation proctitis or nail damage caused by microwave radiation. These detailed ICD-10 codes guide precise documentation of various accidental or therapeutic radiation exposures over time.
External causes of morbidity and mortality (V01–Y99)
Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)
W90 Exposure to other nonionizing radiation
W90.0 Exposure to radiofrequency
- W90.0XXA Exposure to radiofrequency, initial encounter
- W90.0XXD Exposure to radiofrequency, subsequent encounter
- W90.0XXS Exposure to radiofrequency, sequela
W90.1 Exposure to infrared radiation
- W90.1XXA Exposure to infrared radiation, initial encounter
- W90.1XXD Exposure to infrared radiation, subsequent encounter
- W90.1XXS Exposure to infrared radiation, sequela
W90.2 Exposure to laser radiation
- W90.2XXA Exposure to laser radiation, initial encounter
- W90.2XXD Exposure to laser radiation, subsequent encounter
- W90.2XXS Exposure to laser radiation, sequela
W90.8 Exposure to other nonionizing radiation
- W90.8XXA Exposure to other nonionizing radiation, initial encounter
- W90.8XXD Exposure to other nonionizing radiation, subsequent encounter
- W90.8XXS Exposure to other nonionizing radiation, sequela
Exposure to other nonionizing radiation (W90)
Instructional Notations
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- exposure to sunlight X32
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- The appropriate 7th character is to be added to each code from category W90
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
