ICD-10 Code L23.3 – Allergic contact dermatitis due to drugs in contact with skin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L23.3 – Allergic contact dermatitis due to drugs in contact with skin
What it is
This code identifies an allergic skin reaction caused by direct contact with a drug on the skin. It reflects contact dermatitis, not a systemic drug reaction.
Clinical signs
Typical findings include localized redness, itching, swelling, and sometimes vesicles or crusting at the contact site. Clinical features vary; refer to documentation.
When to use this code
Use L23.3 when the record states allergic contact dermatitis from a medication applied to the skin, such as a topical preparation. You should code it when the reaction is documented as allergic and linked to skin contact, not ingestion or injection.
Do not use for
Do not use this code for irritant contact dermatitis or for generalized drug eruptions without skin contact. Check documentation if the reaction source, route, or diagnosis is unclear.
Coding tip
Confirm the causative drug and route of exposure are documented before assigning L23.3.