ICD-10 Code L30.9 – Dermatitis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L30.9 – Dermatitis, unspecified
What it is
L30.9 identifies dermatitis when the type is not further specified in the record. It is used for inflammatory skin irritation or rash without a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include redness, itching, scaling, or irritated skin, but you should code only what is documented.
When to use this code
Use L30.9 when the provider documents dermatitis but does not name a specific form such as atopic, contact, or seborrheic dermatitis. It also applies when the chart lacks enough detail to assign a more specific code.
If later notes identify the exact dermatitis type, you should update coding to the more specific diagnosis. Check documentation for site, cause, and any stated subtype before defaulting to unspecified.
Do not use for
Do not use L30.9 when a specific dermatitis diagnosis is documented. Do not use it for unrelated rashes or skin disorders that have their own code.
Coding tip
Query the provider when the note says “dermatitis” but the subtype is unclear, because a more specific code is often available.