ICD-10 Code L50 – Urticaria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L50 – Urticaria
What it is
L50 identifies urticaria, a skin reaction marked by transient wheals or hives. It is used when the record documents urticaria without a more specific subtype.
Clinical signs
Typical findings include raised, itchy, erythematous wheals that may appear and fade quickly. Clinical features vary; refer to documentation for trigger, duration, and whether angioedema is present.
When to use this code
Use L50 when the clinician documents urticaria or hives and does not specify a more detailed diagnosis. It may fit acute, chronic, or unspecified urticaria when the note is not more specific. Check documentation if the record mentions an allergic reaction, rash, or swelling without confirming urticaria.
Do not use for
Do not use L50 for isolated angioedema, contact dermatitis, or nonspecific rash unless urticaria is clearly documented. If the chart names a specific urticaria subtype, code that more precise category instead.
Coding tip
Code the most specific urticaria type documented, and query the provider if the description is unclear or only “rash” is recorded.