ICD-10 L25
Non-Billable HeaderUnspecified contact dermatitis
About ICD-10-CM L25
ICD-10-CM code L25 represents Unspecified contact dermatitis. This is a non-billable header code in the Skin and Subcutaneous Tissue chapter (block L25). The 2026 edition of ICD-10-CM L25 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 1 Excludes
Pure excludes, these codes can never be coded together with L25. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- allergic contact dermatitis (L23.-)
- allergy NOS (T78.40)
- dermatitis NOS (L30.9)
- irritant contact dermatitis (L24.-)
Type 2 Excludes
Not included here, the excluded code is not part of L25, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- dermatitis due to ingested substances (L27.-)
- dermatitis of eyelid (H01.1-)
- eczema of external ear (H60.5-)
- perioral dermatitis (L71.0)
- radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
Medicare LCD Coverage for L25
Local Coverage Determinations (LCDs) from CMS MACs that list L25 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 L25.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but L25 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with L25
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 L25
Other codes in section L20-L30 (Dermatitis and eczema).
ICD-10 L25, Billing FAQ
Is ICD-10 code L25 billable? +
No, L25 is a non-billable header code. Use a more specific child code from block L25 when submitting claims.
What codes are Type 1 Excludes for L25? +
Type 1 Excludes (never code together with L25): allergic contact dermatitis (L23.-); allergy NOS (T78.40); dermatitis NOS (L30.9)
What codes are Type 2 Excludes for L25? +
Type 2 Excludes (may be coded together when both conditions exist): dermatitis due to ingested substances (L27.-); dermatitis of eyelid (H01.1-); eczema of external ear (H60.5-)
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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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