Exposure to other nonionizing radiation (W90) ICD-10-CM
The W90 code range covers exposure to other nonionizing radiation with 17 ICD-10-CM diagnosis codes. 12 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
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
Codes in the W90 Range 17 codes · 12 billable
- W90 Exposure to other nonionizing radiationNon-billable
- W90.0 Exposure to radiofrequencyNon-billable
- 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 radiationNon-billable
- 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 radiationNon-billable
- 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 radiationNon-billable
- 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
About the W90 Code Range
These codes describe exposure to radiofrequency, infrared, laser, or other nonionizing radiation.
W90 separates exposures by type: W90.0 for radiofrequency, W90.1 for infrared, W90.2 for laser, and W90.8 for other nonionizing radiation. The final character distinguishes an initial encounter (A), a subsequent encounter (D), or a sequela (S), meaning a later effect.
Questions About This Page
How many billable codes are in the W90 range?
Of the 17 codes in this range, 12 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the W90 range classify?
The range classifies exposure to other nonionizing radiation. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
