2026 ICD-10-CM Diagnosis Code L58.1Chronic radiodermatitis

ICD-10-CM Codes›L00–L99›L55-L59›L58

ICD-10-CM L58.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L58.1 is a billable ICD-10-CM diagnosis code for chronic radiodermatitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. Coders also document this condition as chronic phototoxic dermatitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Contact dermatitis.

Code Identity

ICD-10-CM Code
L58.1
Billable Status
Yes — Valid for Submission
Code Describes
Chronic radiodermatitis
Short Description
Chronic radiodermatitis
Same as the full description in the CMS dataset.
Parent Code
L58
Radiodermatitis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL55-L59Radiation-related disorders of the skin and subcutaneous tissue
CategoryL58Radiodermatitis
This CodeL58.1Chronic radiodermatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic phototoxic dermatitis
  • Chronic radiodermatitis due to and following radiotherapy caused by ionizing radiation
  • Dermatitis as late effect of radiation
  • Disorder of skin due to radiotherapy
  • Hypermelanosis caused by photodynamic agent
  • Hypermelanosis due to phytophotodermatitis
  • Radiation alopecia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Alopecia(hereditaria) (seborrheica)
      • X-ray
    • Dermatitis(eczematous)
      • due to
        • radioactive substance
          • chronic
    • Dermatitis(eczematous)
      • due to
        • radium
          • chronic
    • Dermatitis(eczematous)
      • due to
        • X-rays
          • chronic
    • Radiodermatitis
      • chronic
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • due to
        • X-ray
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • X-ray

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN005
Contact dermatitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Radiodermatitis

    a cutaneous inflammatory reaction occurring as a result of exposure to ionizing radiation.

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.

Convert L58.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
692.82 Dermatitis oth radiation
Approximate The match is approximate rather than exact.

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 L58.1Overview

Is L58.1 (Radiodermatitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chronic radiodermatitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L58.1 group to?

When chronic radiodermatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L58.1?

Under the General Equivalence Mappings, chronic radiodermatitis converts to ICD-9-CM 692.82 (dermatitis oth radiation). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.