ICD-10 Code L25.9 – Unspecified Contact Dermatitis, Unspecified Cause (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L25.9 – Unspecified contact dermatitis, unspecified cause
What it is
L25.9 identifies contact dermatitis when the reaction is documented, but the irritant or allergen is not specified. Use it for skin inflammation caused by contact exposure when details are incomplete.
Clinical signs
Typical findings include localized redness, itching, swelling, or rash at the exposure site. Clinical features vary; refer to documentation.
When to use this code
Use L25.9 when the note says contact dermatitis but does not name the trigger, such as soap, metal, plants, or chemicals. It also fits when the cause is unknown or not documented. Confirm the condition is contact dermatitis, not another type of eczema or rash.
Do not use for
Do not use this code if the allergen or irritant is identified and a more specific contact dermatitis code applies. Do not use it for dermatitis that is documented as atopic, seborrheic, or otherwise unrelated to contact exposure.
Coding tip
Check the chart for the exact trigger before assigning L25.9; if the cause is named, code the more specific option instead.