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    v1.0.28
    OpenPayerBilling CodesRadiation-related disorders of the skin and subcutaneous tissueICD-10-CM l59-radiation-related-skin-disorders
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    ICD-10-CM Code For Other Disorders Of Skin And Subcutaneous Tissue Related To Radiation: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group L59 includes radiation-related dermatitis, skin atrophy, fibrosis, and other skin and subcutaneous tissue reactions resulting from therapeutic or accidental exposure to ionizing radiation. These ICD-10-CM diagnosis codes are used to document dermatologic reactions to radiation, capturing severity, acute versus chronic presentations, and involvement of surrounding soft tissues. Accurate coding within the ICD-10-CM L59 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM L59: Other Disorders Of Skin And Subcutaneous Tissue Related To Radiation Overview

    This diagnosis group represents skin and subcutaneous tissue conditions caused by exposure to ionizing radiation, including acute and chronic radiation dermatitis and related reactions. It targets dermatologic sequelae of therapeutic or environmental radiation affecting the integumentary system. Accurate coding matters for correct claim submission and to reflect the clinical complexity for reimbursement.

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    When to Use

    Use a code from this group when a patient has a documented skin or subcutaneous tissue condition that is attributed to therapeutic or accidental radiation exposure. Select the code that reflects the specific diagnosis, timing (acute versus chronic), and severity documented in the clinical record.

    ICD-10-CM Codes

    3 rows

    ICD-10-CM CodeDescription
    L59.0Erythema ab igne [dermatitis ab igne]
    L59.8Other specified disorders of the skin and subcutaneous tissue related to radiation
    L59.9Disorder of the skin and subcutaneous tissue related to radiation, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    606Minor Skin Disorders with MCC
    607Minor Skin Disorders without MCC

    Typical Clinical Scenarios

    • An adult cancer patient several weeks after completing external beam radiation therapy to the chest presents with painful, erythematous, and desquamating skin confined to the radiation field. The patient reports escalating burning pain, weeping of serous fluid, and difficulty wearing clothing over the area, prompting outpatient evaluation and wound care management; a radiation-related dermatitis code from this group is assigned to document the skin reaction caused by therapeutic ionizing radiation. Typical codes: L59.0.
    • An elderly patient with a history of frequent diagnostic or therapeutic radiologic procedures develops chronic hyperpigmented, atrophic patches and telangiectasias in previously irradiated skin months to years after exposure; they seek dermatology consultation for cosmetic and symptomatic concerns. Because the findings represent a late, non-acute skin disorder attributable to prior radiation exposure, a non-acute radiation-related skin disorder code from this group is used to capture the chronic sequelae. Typical codes: L59.9, L59.8.
    • A patient undergoing palliative radiation for a pelvic malignancy presents to urgent care with severe ulceration and secondary infection within the radiation portal, associated with systemic signs such as fever and leukocytosis. The acute, complicated presentation requires documentation of a radiation-induced skin ulceration with superimposed infection as a comorbid condition contributing to the urgent problem; an appropriate radiation-related skin disorder code from this group is assigned alongside infection codes. Typical codes: L59.8, L59.0.

    Related Codes

    L55-SUNBURN

    ICD-10-CM Code For Sunburn: Group Overview

    L56-OTHER-ACUTE-SKIN-CHANGES

    ICD-10-CM Code For Other Acute Skin Changes Due To Ultraviolet Radiation: Group Overview

    L57-SKIN-CHANGES-DUE-TO-NONIONIZING-RADIATION

    ICD-10-CM Code For Skin Changes Due To Chronic Exposure To Nonionizing Radiation: Group Overview

    L58-RADIODERMATITIS

    ICD-10-CM Code For Radiodermatitis: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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