ICD-10 Code L23.5 – Allergic contact dermatitis due to other chemical products (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L23.5 – Allergic contact dermatitis due to other chemical products
What it is
L23.5 identifies an allergic skin reaction caused by contact with a chemical product not classified elsewhere. Use it when the record links dermatitis to a specific chemical exposure.
Clinical signs
Typical findings include itching, redness, swelling, and eczematous rash at the contact site. Clinical features vary; refer to documentation for the exact allergen and skin distribution.
When to use this code
Use L23.5 when the clinician documents allergic contact dermatitis from a chemical product such as a cleanser, adhesive, or industrial agent, and the substance is not named in a more specific code. You may also use it when the note states “other chemical products” or gives a clear chemical trigger without a better ICD-10 option.
Do not use for
Do not use this code for irritant contact dermatitis, unspecified dermatitis, or reactions from drugs taken internally. If the allergen is a specific substance with its own code, use the more specific diagnosis instead.
Coding tip
Code the documented allergen whenever possible; if the source is vague, check documentation before defaulting to L23.5.