ICD-10 Code L24.A9 – Irritant contact dermatitis due friction or contact with other specified body fluids (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L24.A9 – Irritant contact dermatitis due friction or contact with other specified body fluids
What it is
This code identifies irritant contact dermatitis caused by friction or exposure to specified body fluids. Use it when the rash is a direct skin irritation rather than an allergic reaction.
Clinical signs
Typical findings include redness, burning, stinging, dryness, or chafing at the contact site. Clinical features vary; refer to documentation for the exact body fluid exposure and skin changes.
When to use this code
Use this code when the record clearly links the dermatitis to friction or to contact with a specified body fluid. It is appropriate when the clinician documents irritant dermatitis, not infection or allergy. Check documentation if the source fluid or mechanism is unclear.
Do not use for
Do not use this code for allergic contact dermatitis, infectious rashes, or nonspecific skin irritation without a documented cause. Do not assume the diagnosis if the note does not support irritant contact dermatitis.
Coding tip
Confirm both the irritant mechanism and the specific body fluid exposure in the note before assigning L24.A9.