ICD-10 Code L01.1 – Impetiginization of other dermatoses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L01.1 – Impetiginization of other dermatoses
What it is
This code identifies a skin condition where an existing dermatitis or other rash has become secondarily infected with impetigo-like bacteria. Use it when the primary problem is another dermatosis, but the lesion now shows impetiginization.
Clinical signs
Typical findings include crusting, oozing, and superficial bacterial infection over a preexisting skin eruption. Clinical features vary; refer to documentation.
When to use this code
Use L01.1 when the record clearly states impetiginization of another dermatosis, such as eczema or another inflamed rash with secondary impetigo. Code the documented underlying skin disorder separately when instructed by the record and coding rules.
Do not use for
Do not use this code for primary impetigo without an underlying dermatosis, or for unrelated skin infections. Check documentation if the note does not specify secondary infection of another skin condition.
Coding tip
Look for wording such as “impetiginized eczema” or “secondary impetigo” to support this code.