ICD-10 W90
Non-Billable HeaderExposure to other nonionizing radiation
About ICD-10-CM W90
ICD-10-CM code W90 represents Exposure to other nonionizing radiation. This is a non-billable header code in the External Causes of Morbidity chapter (block W90). The 2026 edition of ICD-10-CM W90 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of W90, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- exposure to sunlight (X32)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to each code from category W90
Medicare LCD Coverage for W90
Local Coverage Determinations (LCDs) from CMS MACs that list W90 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing W90.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but W90 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with W90
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To W90
Other codes in section W85-W99 (Exposure to electric current, radiation and extreme ambient air temperature and pressure).
ICD-10 W90, Billing FAQ
Is ICD-10 code W90 billable? +
No, W90 is a non-billable header code. Use a more specific child code from block W90 when submitting claims.
What codes are Type 2 Excludes for W90? +
Type 2 Excludes (may be coded together when both conditions exist): exposure to sunlight (X32)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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