L55-L59
Medium Complexity

Radiation-related disorders of the skin and subcutaneous tissue

Primary Specialty: Dermatology
Last Updated: 2025-09-09

ICD-10 Codes (26)

22 billable
0 category headers
L56
Other acute skin changes due to ultraviolet radiation
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L56.0
Billable
Drug phototoxic response
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L56.1
Billable
Drug photoallergic response
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L56.2
Billable
Photocontact dermatitis [berloque dermatitis]
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L56.3
Billable
Solar urticaria
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L56.4
Billable
Polymorphous light eruption
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L56.5
Billable
Disseminated superficial actinic porokeratosis (DSAP)
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L56.8
Billable
Other specified acute skin changes due to ultraviolet radiation
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L56.9
Billable
Acute skin change due to ultraviolet radiation, unspecified
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L57
Skin changes due to chronic exposure to nonionizing radiation
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L57.0
Billable
Actinic keratosis
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L57.1
Billable
Actinic reticuloid
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L57.2
Billable
Cutis rhomboidalis nuchae
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L57.3
Billable
Poikiloderma of Civatte
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L57.4
Billable
Cutis laxa senilis
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L57.5
Billable
Actinic granuloma
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L57.8
Billable
Other skin changes due to chronic exposure to nonionizing radiation
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L57.9
Billable
Skin changes due to chronic exposure to nonionizing radiation, unspecified
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L58
Radiodermatitis
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L58.0
Billable
Acute radiodermatitis
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L58.1
Billable
Chronic radiodermatitis
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L58.9
Billable
Radiodermatitis, unspecified
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L59
Other disorders of skin and subcutaneous tissue related to radiation
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L59.0
Billable
Erythema ab igne [dermatitis ab igne]
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L59.8
Billable
Other specified disorders of the skin and subcutaneous tissue related to radiation
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L59.9
Billable
Disorder of the skin and subcutaneous tissue related to radiation, unspecified
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Updates & Changes

FY 2026 Updates

Current Year

Deleted Codes

No codes deleted in this range for FY 2026

No significant changes for FY 2026

This range maintains stability with current coding practices

Historical Changes

  • FY 2025: Routine maintenance updates with minor terminology clarifications
  • FY 2024: Enhanced specificity requirements for certain code ranges
  • FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • Proposed updates pending review by Coordination and Maintenance Committee
  • Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • Review all FY 2026 updates for L55-L59 codes before implementation
  • Always verify the most current codes in the ICD-10-CM manual
  • Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The L55-L59 range in the ICD-10 pertains to radiation-related disorders of the skin and subcutaneous tissue. These codes are used to document conditions such as sunburn, actinic keratosis, and radiation-related skin disorders. The range is designed to cover a variety of conditions related to radiation exposure, including both natural (sunlight) and artificial (medical treatment) sources.

Key Usage Points:

  • L55 codes are used for sunburn of varying degrees.
  • L56 codes cover other acute skin changes due to ultraviolet radiation.
  • L57 codes are used for chronic skin changes due to ultraviolet radiation.
  • L58 is for radiodermatitis.
  • L59 codes cover other disorders of the skin and subcutaneous tissue related to radiation.

Coding Guidelines

When to Use:

  • When a patient presents with sunburn.
  • When a patient has skin changes due to UV radiation.
  • When a patient has chronic skin changes due to UV radiation.
  • When a patient has radiodermatitis.
  • When a patient has other skin disorders related to radiation.

When NOT to Use:

  • When the skin condition is not related to radiation.
  • When the skin condition is congenital.
  • When the skin condition is due to an infection.
  • When the skin condition is due to a systemic disease.

Code Exclusions

Always verify exclusions with the patient's clinical history and provider's notes.

Documentation Requirements

Documentation for these codes should include the specific type of radiation-related skin disorder, the cause of the radiation exposure (if known), the severity of the condition, and any related symptoms or complications.

Clinical Information:

  • Specific type of radiation-related skin disorder
  • Cause of radiation exposure
  • Severity of the condition
  • Related symptoms or complications

Supporting Evidence:

  • Clinical examination findings
  • Imaging results
  • Laboratory test results
  • Provider's notes
Good Documentation Example:

Patient presents with severe sunburn on the back and shoulders after a day at the beach. Skin is red and blistered.

Poor Documentation Example:

Patient has sunburn.

Common Documentation Errors:

  • Not specifying the type of radiation-related skin disorder
  • Not documenting the cause of radiation exposure
  • Not indicating the severity of the condition
  • Not documenting related symptoms or complications

Range Statistics

5
Total Codes
22
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:12

Coding Complexity

Medium
Complexity Rating

The complexity of these codes is considered medium because they require a detailed understanding of different types of radiation-related skin disorders, the causes of radiation exposure, and the associated symptoms and complications. However, with proper documentation, these codes can be used accurately and effectively.

Key Factors:
  • Determining the specific type of radiation-related skin disorder
  • Identifying the cause of radiation exposure
  • Assessing the severity of the condition
  • Documenting related symptoms or complications

Specialty Focus

These codes are primarily used by dermatologists, but can also be used by primary care physicians, oncologists, and other specialists who treat skin conditions.

Primary Specialties:
Dermatology
60%
Oncology
30%
Primary Care
10%
Clinical Scenarios:
  • Patient presents with severe sunburn after a day at the beach.
  • Patient has actinic keratosis due to chronic sun exposure.
  • Patient develops radiodermatitis after radiation therapy for cancer.
  • Patient has skin changes due to tanning bed use.

Resources & References

The official ICD-10 guidelines, the American Academy of Dermatology, and the American Society for Radiation Oncology are valuable resources for these codes.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • American Academy of Dermatology
  • American Society for Radiation Oncology

Clinical References:

    Educational Materials:

      Frequently Asked Questions

      Can L55-L59 codes be used for skin conditions due to non-radiation causes?

      No, these codes are specifically for radiation-related skin disorders. Other skin conditions have their own specific codes in the ICD-10.