Radiation-related disorders of the skin and subcutaneous tissue (L55-L59) ICD-10-CM
The L55–L59 section covers radiation-related disorders of the skin and subcutaneous tissue with 31 ICD-10-CM diagnosis codes, of which 26 are billable in fiscal year 2026. The section is organized into the 5 code ranges listed below.
Code Ranges in This Section 5 ranges · 31 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the L55–L59 Code Range
ICD-10 codes L55 through L59 cover a range of skin and subcutaneous tissue disorders caused by radiation, mainly ultraviolet (UV) radiation and other nonionizing or ionizing sources. These codes classify conditions from various degrees of sunburn to chronic skin changes and radiodermatitis.
This range includes specific codes for sunburn (L55), distinguishing first- through third-degree burns and unspecified types. It also addresses acute skin reactions to UV radiation under L56, such as drug-related phototoxic and photoallergic responses, photocontact dermatitis (also known as berloque dermatitis), solar urticaria, and polymorphous light eruption—terms often used interchangeably depending on the underlying cause. Chronic exposure effects like actinic keratosis and skin changes from prolonged nonionizing radiation are classified under L57, including conditions like poikiloderma of Civatte and cutis rhomboidalis nuchae. The codes L58 and L59 cover radiodermatitis and other radiation-related skin disorders such as erythema ab igne (heat-induced dermatosis) and disorders from ionizing radiation. Using these specific codes helps accurately capture diverse skin conditions induced by different types and durations of radiation exposure.
Questions About This Page
How many codes are in the L55-L59 range?
The L55-L59 range contains 31 ICD-10-CM diagnosis codes in FY 2026. 26 of them are billable, and the rest are category headers that organize the section.
What conditions does L55-L59 cover?
The range covers radiation-related disorders of the skin and subcutaneous tissue. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
