ICD-10 Code L27.8 – Dermatitis due to other substances taken internally (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L27.8 – Dermatitis due to other substances taken internally
What it is
L27.8 identifies dermatitis caused by an internally taken substance other than the more specific listed causes. Use it when the reaction is cutaneous and linked to ingestion or another internal exposure.
Clinical signs
Findings usually include a rash, erythema, itching, or other dermatitis-type skin changes after exposure. Clinical features vary; refer to documentation.
When to use this code
Use L27.8 when the record clearly links dermatitis to a medication, food, supplement, or other swallowed substance, but a more specific code is not documented. It also fits when the provider documents an internal substance-related skin reaction without naming a different L27 category. Check documentation for the exact trigger.
Do not use for
Do not use this code for contact dermatitis from external exposure, or when the reaction is better classified elsewhere. If the documentation identifies a more specific drug eruption or allergic reaction code, use that instead.
Coding tip
Code the documented cause when available, and confirm the reaction is from internal exposure before selecting L27.8.