ICD-10 Code L50.4 – Vibratory urticaria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L50.4 – Vibratory urticaria
What it is
Vibratory urticaria is a physical urticaria triggered by vibration or mechanical shaking. It causes transient hive-like skin reactions after exposure to the trigger.
Clinical signs
Typical findings include localized swelling, redness, itching, or wheals after vibration exposure. Clinical features vary; refer to documentation.
When to use this code
Use L50.4 when the record clearly documents vibratory urticaria or urticaria provoked by vibration. This code fits cases where the clinician identifies vibration as the specific trigger, such as tools, machinery, or similar mechanical exposure.
If the note only says “urticaria” without a trigger, check documentation before assigning this code.
Do not use for
Do not use this code for nonspecific hives, allergic reactions, or other physical urticarias unless vibration is documented as the cause. Check documentation if the trigger is unclear.
Coding tip
Code the documented trigger, not just the rash, and make sure the note links symptoms to vibration exposure.