ICD-10 Code L23.89 – Allergic contact dermatitis due to other agents (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L23.89 – Allergic contact dermatitis due to other agents
What it is
L23.89 identifies allergic contact dermatitis caused by an agent not named in a more specific ICD-10 category. It is used when skin inflammation follows exposure to a known allergen, but the exact substance is documented as “other.”
Clinical signs
Typical findings include localized redness, itching, swelling, and sometimes vesicles or scaling at the contact site. Clinical features vary; refer to documentation for the specific allergen and distribution.
When to use this code
Use this code when the record clearly supports allergic contact dermatitis and the trigger is identified as an “other” agent rather than a listed substance. It also fits when the clinician documents contact allergy with a compatible rash after exposure. Check documentation if the allergen is unspecified or if the diagnosis is not confirmed.
Do not use for
Do not use it for irritant contact dermatitis, atopic dermatitis, or unspecified dermatitis without evidence of an allergic cause. Avoid this code when a more specific contact dermatitis code matches the documented allergen.
Coding tip
Code the documented allergen whenever possible, and use L23.89 only when the record supports allergic contact dermatitis but the agent falls into the “other” category.