2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L58.1 is a billable ICD-10-CM diagnosis code for chronic radiodermatitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L58.1: its own notes plus those printed at L58 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From L58 Radiodermatitis applies to 3 codes
  • code to identify the source of the radiation (W88, W90)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L58.1, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming L58.1: they are not reported together with it, unless the two conditions are unrelated.

  • K13.0 Diseases of lips
    cheilitis due to radiation-related disorders (L55-L59) names L55-L59, which includes this code
  • T66 Radiation sickness, unspecified
    radiation related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • T67 Effects of heat and light
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code

Excludes2 6

These codes carry an Excludes2 note naming L58.1: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block L20-L30 Dermatitis and eczema
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • L23 Allergic contact dermatitis
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • L24 Irritant contact dermatitis
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • L25 Unspecified contact dermatitis
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • Block T20-T32
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code
  • X32 Exposure to sunlight
    radiation-related disorders of the skin and subcutaneous tissue (L55-L59) names L55-L59, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L58.1Overview

What is the ICD-10 code for chronic radiodermatitis?

The ICD-10-CM code for chronic radiodermatitis is L58.1 (sometimes written as L581). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does L58.1 group to?

When chronic radiodermatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.

Does L58.1 need an additional code?

When the condition applies, yes. The Use Additional Code note at L58, which applies to L58.1, reads: code to identify the source of the radiation (W88, W90). The additional code is reported after L58.1.

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.