2026 ICD-10-CM Diagnosis Code L59Other disorders of skin and subcutaneous tissue related to radiation

ICD-10-CM Codes›L00–L99›L55-L59›L59

ICD-10-CM L59
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L59 is a non-billable ICD-10-CM category code for other disorders of skin and subcutaneous tissue related to radiation, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L59.0, L59.8, and L59.9.

Code Identity

ICD-10-CM Code
L59
Billable Status
No — Non-Billable Category
Code Describes
Other disorders of skin and subcutaneous tissue related to radiation
Chapter
L55-L59
Radiation-related disorders of the skin and subcutaneous tissue

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL55-L59Radiation-related disorders of the skin and subcutaneous tissue
CategoryL59Other disorders of skin and subcutaneous tissue related to radiation
This CodeL59Other disorders of skin and subcutaneous tissue related to radiation

Specific Coding for Oth disorders of skin, subcu related to radiationOverview

Non-specific codes like L59 require more characters. Use one of these billable codes instead:

  • Use L59.0 for Erythema ab igne [dermatitis ab igne]

  • Use L59.8 for Other specified disorders of the skin and subcutaneous tissue related to radiation

  • Use L59.9 for Disorder of the skin and subcutaneous tissue related to radiation, unspecified

Patient EducationClinical

Radiation Exposure

Radiation is energy. It travels in the form of energy waves or high-speed particles. Radiation can occur naturally or be man-made. There are two types:

The full article covers:

  • What is radiation?
  • What are the sources of radiation exposure?
  • What are the health effects of radiation exposure?
  • What are the treatments for acute radiation sickness?
  • How can radiation exposure be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L59Overview

Is L59 a billable code?

No. This is a category header that groups the codes for other disorders of skin and subcutaneous tissue related to radiation, and headers cannot be submitted on claims. Claims for other disorders of skin and subcutaneous tissue related to radiation need a more specific code from this category, such as L59.0, L59.8, and L59.9.