Urticaria (L50) ICD-10-CM
The L50 code range covers urticaria with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the L50 Range 10 codes · 9 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L50 range.
Urticaria
A vascular reaction of the skin characterized by erythema and wheal formation due to localized increase of vascular permeability. The causative mechanism may be allergy, infection, or stress.
About the L50 Code Range
Urticaria is a skin reaction marked by redness and raised welts as blood vessels in the affected area become more permeable. It sits in the urticaria and erythema group of skin diseases.
The subdivisions of L50 distinguish allergic urticaria, urticaria without a known cause, and urticaria due to cold or heat. They also name dermatographic, vibratory, cholinergic, and contact forms. Separate codes identify other and unspecified urticaria.
Questions About This Page
How many billable codes are in the L50 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the L50 range classify?
The range classifies urticaria. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
