2026 ICD-10-CM Diagnosis Code L23Allergic contact dermatitis

ICD-10-CM Codes›L00–L99›L20-L30›L23

ICD-10-CM L23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L23 is a non-billable ICD-10-CM category code for allergic contact dermatitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L23.0, L23.1, L23.2, and L23.3.

Code Identity

ICD-10-CM Code
L23
Billable Status
No — Non-Billable Category
Code Describes
Allergic contact dermatitis
Chapter
L20-L30
Dermatitis and eczema

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL23Allergic contact dermatitis
This CodeL23Allergic contact dermatitis

Specific Coding for Allergic contact dermatitisOverview

Non-specific codes like L23 require more characters. Use one of these billable codes instead:

  • Use L23.0 for Allergic contact dermatitis due to metals

  • Use L23.1 for Allergic contact dermatitis due to adhesives

  • Use L23.2 for Allergic contact dermatitis due to cosmetics

  • Use L23.3 for Allergic contact dermatitis due to drugs in contact with skin

  • Use L23.4 for Allergic contact dermatitis due to dyes

  • Use L23.5 for Allergic contact dermatitis due to other chemical products

  • Use L23.6 for Allergic contact dermatitis due to food in contact with the skin

  • Use L23.7 for Allergic contact dermatitis due to plants, except food

  • L23.8 for Allergic contact dermatitis due to other agents

  • Use L23.81 for Allergic contact dermatitis due to animal (cat) (dog) dander

  • Use L23.89 for Allergic contact dermatitis due to other agents

  • Use L23.9 for Allergic contact dermatitis, unspecified cause

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

Type 2 Excludes

  • dermatitis due to substances taken internally L27
  • dermatitis of eyelid H01.1
  • diaper dermatitis L22
  • eczema of external ear H60.5
  • irritant contact dermatitis L24
  • perioral dermatitis L71.0
  • radiation-related disorders of the skin and subcutaneous tissue L55 L59

Clinical InformationClinical

  • Allergic Contact Dermatitis

    an inflammatory skin condition caused by an immune response to direct contact between the skin and an allergen. it consists of a delayed type of allergic reaction at the affected site with resulting red, swollen, and blistered skin that may itch or leak.

Patient EducationClinical

Allergy

An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:

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 L23Overview

Is L23 (Allergic contact dermatitis) a billable code?

No. This is a category header that groups the codes for allergic contact dermatitis, and headers cannot be submitted on claims. Claims for allergic contact dermatitis need a more specific code from this category, such as L23.0, L23.1, and L23.2.