2026 ICD-10-CM Diagnosis Code W90Exposure to other nonionizing radiation
W90 is a non-billable ICD-10-CM category code for exposure to other nonionizing radiation, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W90.0XXA, W90.0XXD, W90.0XXS, and W90.1XXA.
Code Identity
Code Classification
Specific Coding for Exposure to other nonionizing radiationOverview
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- exposure to sunlight X32
7th Character Note
- The appropriate 7th character is to be added to each code from category W90
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
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.
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.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Patient EducationClinical
Electromagnetic Fields
Electric and magnetic fields (EMFs), also called radiation, are areas of energy that surround electrical devices. Everyday sources of EMFs include:
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Code HistoryHistory
Questions About W90Overview
Is W90 (Exposure to other nonionizing radiation) a billable code?
No. This is a category header that groups the codes for exposure to other nonionizing radiation, and headers cannot be submitted on claims. Claims for exposure to other nonionizing radiation need a more specific code from this category, such as W90.0XXA, W90.0XXD, and W90.0XXS.
