ICD-10 Code L23.4 – Allergic contact dermatitis due to dyes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L23.4 – Allergic contact dermatitis due to dyes
What it is
This code identifies allergic contact dermatitis caused by exposure to dyes. It means the skin reaction is triggered by a specific dye allergen, not by irritation alone.
Clinical signs
Typical findings include localized redness, itching, swelling, and rash at the contact site. Clinical features vary; refer to documentation when the allergen source or pattern is not clearly stated.
When to use this code
Use this code when the provider documents allergic contact dermatitis due to dyes, such as reactions linked to clothing, cosmetics, hair products, or other dyed materials. It is appropriate when the diagnosis names dyes as the cause or clearly identifies a dye-related allergen. Check documentation if the record only says dermatitis without a specific trigger.
Do not use for
Do not use this code for simple skin irritation, unspecified contact dermatitis, or reactions to non-dye substances. If the allergen is not confirmed, check documentation before assigning L23.4.
Coding tip
Code L23.4 only when the record links the dermatitis to dyes, and capture the specific source if the documentation supports it.