Idiopathic urticaria
ICD-10 L50.1 is a billable code used to indicate a diagnosis of idiopathic urticaria.
Idiopathic urticaria, also known as chronic spontaneous urticaria, is characterized by the sudden appearance of hives (wheals) on the skin without an identifiable trigger. Clinically, patients may present with itchy, raised welts that can vary in size and may appear anywhere on the body. The condition can be acute or chronic, with chronic cases lasting more than six weeks. The underlying anatomy involved includes the dermis and epidermis, where mast cells release histamine and other mediators, leading to vasodilation and increased vascular permeability. Disease progression can vary, with some patients experiencing spontaneous resolution while others may have recurrent episodes over months or years. Diagnostic considerations include a thorough patient history, physical examination, and exclusion of other potential causes of urticaria, such as allergic reactions, infections, or autoimmune disorders. Laboratory tests may be warranted in atypical cases to rule out underlying conditions.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
L50.1 specifically covers chronic spontaneous urticaria where no identifiable cause is found. It does not include urticaria due to known allergens or physical stimuli.
L50.1 should be used when the urticaria is chronic and idiopathic, distinguishing it from acute urticaria (L50.0) or other specific types of urticaria that have identifiable triggers.
Documentation should include a comprehensive patient history, details of the urticaria episodes, treatments tried, and responses to those treatments. Any laboratory tests performed to rule out other conditions should also be included.
