ICD-10-CM L23: Allergic contact dermatitis

ICD-10-CM Diagnosis Code (2025)

Official Description for L23

Allergic contact dermatitis

Coding Notes & Guidelines for L23

Excludes1: Not Coded Here
  • allergy NOS (T78.40)
  • contact dermatitis NOS (L25.9)
  • dermatitis NOS (L30.9)
Excludes2: Not Included Here
  • 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)
Excludes2: Not Included Here

dermatitis due to ingested drugs and medicaments (L27.0-L27.1)

Excludes2: Not Included Here

dermatitis due to ingested food (L27.2)

Excludes2: Not Included Here

allergy NOS due to pollen (J30.1)

Use Additional Code

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Inclusion Terms
  • Allergic contact dermatitis due to chromium
  • Allergic contact dermatitis due to nickel
Inclusion Terms
  • Allergic contact dermatitis due to cement
  • Allergic contact dermatitis due to insecticide
  • Allergic contact dermatitis due to plastic
  • Allergic contact dermatitis due to rubber
Inclusion Terms

Allergic contact dermatitis due to animal (cat) (dog) hair

Inclusion Terms

Allergic contact eczema NOS

Child Codes (More Specific Codes for L23):

About ICD-10-CM Code L23 (Allergic contact dermatitis)

ICD-10-CM code L23 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM L23 became effective on October 1, 2024.

This page provides detailed information about L23 - Allergic contact dermatitis. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Allergic contact dermatitis.