ICD-10 Code L22 – Diaper dermatitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L22 – Diaper dermatitis
What it is
Diaper dermatitis is an irritant rash in the diaper area, usually caused by prolonged contact with urine, stool, friction, or moisture. It affects the skin covered by the diaper and is common in infants and young children.
Clinical signs
Typical findings include erythema, irritation, and inflamed skin in the diaper region. The rash may spare the skin folds in simple irritant cases; clinical features vary, so refer to documentation.
When to use this code
Use L22 when the provider documents diaper dermatitis, diaper rash, or irritant dermatitis limited to the diaper area. This code fits uncomplicated cases without a more specific cause documented. If another diagnosis, such as candidiasis, is documented, code that condition instead.
Do not use for
Do not use L22 for fungal diaper rash, allergic contact dermatitis, or other specified skin disorders unless the record clearly supports diaper dermatitis. Check documentation when the cause or type of rash is not stated.
Coding tip
Code the documented diagnosis as written, and do not assume the rash is diaper dermatitis if the provider identifies a different etiology.