Other disorders of skin and subcutaneous tissue related to radiation (L59) ICD-10-CM
The L59 code range covers other disorders of skin and subcutaneous tissue related to radiation with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the L59 Range 4 codes · 3 billable
- L59 Other disorders of skin and subcutaneous tissue related to radiationNon-billable
- L59.0 Erythema ab igne [dermatitis ab igne]
- L59.8 Other specified disorders of the skin and subcutaneous tissue related to radiation
- L59.9 Disorder of the skin and subcutaneous tissue related to radiation, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L59 range.
Erythema Ab Igne
A cutaneous finding caused by prolonged heat exposure (e.g., space heater) and local heat injury (e.g., caused by LASER THERAPY). It is characterized by epidermal atrophy, reticular hyperpigmentation, and telangiectatic dermatosis.
Laser Therapy
The use of photothermal effects of LASERS to coagulate, incise, vaporize, resect, dissect, or resurface tissue.
About the L59 Code Range
ICD-10 code L59 covers various skin and subcutaneous tissue disorders caused by radiation exposure. These codes help identify specific conditions resulting from different types of radiation injury to the skin, including heat and ionizing radiation effects.
This section includes L59.0, which codes for erythema ab igne (also known as dermatitis ab igne or heat-induced dermatosis), a skin condition caused by prolonged heat exposure. L59.8 encompasses other specified radiation-related skin disorders like poikiloderma, telangiectasia, scars from radiotherapy, and contact dermatitis caused by X-rays, sometimes linked to rare syndromes such as RIDDLE syndrome. L59.9 is used when the skin disorder related to radiation is unspecified and may include conditions like sun-damaged facial skin or ultraviolet sensitivity. These codes enable precise documentation for cases where radiation, including medical treatments or environmental exposure, leads to distinct skin complications, supporting accurate diagnosis and treatment planning.
Questions About This Page
How many billable codes are in the L59 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the L59 range classify?
The range classifies other disorders of skin and subcutaneous tissue related to radiation. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
