ICD-10 Code L23.8 – Allergic contact dermatitis due to other agents (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L23.8 – Allergic contact dermatitis due to other agents
What it is
L23.8 identifies allergic contact dermatitis caused by an agent not named in a more specific ICD-10 category. Use it when skin inflammation follows exposure to an allergen and the record does not support a more exact code.
Clinical signs
Typical findings include localized itching, redness, swelling, and eczematous rash at the contact site. Clinical features vary; refer to documentation if the record does not clearly describe the allergen or skin distribution.
When to use this code
Use L23.8 when the clinician documents allergic contact dermatitis and identifies an external trigger, but the substance is not one of the more specific coded allergens. It also fits cases where the note says “other agent” or provides an unspecified allergen within this category.
Do not use for
Do not use this code for irritant contact dermatitis, atopic dermatitis, or contact reactions without an allergic basis. If the allergen is specifically named elsewhere in ICD-10-CM, check documentation and code the more precise option.
Coding tip
Confirm the note supports an allergic mechanism and that no more specific L23 code applies before assigning L23.8.