ICD-10 Code L70.9 – Acne, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L70.9 – Acne, unspecified
What it is
L70.9 identifies acne when the record does not specify the type or severity. Use it for common acne conditions that are documented simply as acne, without additional detail.
Clinical signs
Typical findings include comedones, papules, pustules, or inflammatory lesions on the face, chest, or back. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents acne but does not name a subtype such as acne vulgaris, cystic acne, or drug-induced acne. It also fits when the note lacks enough detail to assign a more specific code. Check documentation before defaulting to unspecified.
Do not use for
Do not use L70.9 if the record clearly identifies a specific acne type or another skin disorder. Do not code it for isolated folliculitis, rash, or other non-acne lesions.
Coding tip
If the diagnosis is vague, query for the acne type before assigning the unspecified code.