ICDwise
L23 ⚠ Non-billable

Allergic contact dermatitis

ICD-10-CM · FY2026 · Diseases of the Skin and Subcutaneous Tissue

Code
L23
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Skin and Subcutaneous Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Excludes1 — never code together
  • allergy NOS (T78.40)
  • contact dermatitis NOS (L25.9)
  • dermatitis NOS (L30.9)
Excludes2 — not included here, but may code together
  • 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)

Frequently asked questions

What is ICD-10 code L23?
ICD-10-CM code L23 represents Allergic contact dermatitis. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Skin and Subcutaneous Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is L23 billable?
No. L23 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is L23 in?
L23 belongs to the Diseases of the Skin and Subcutaneous Tissue chapter (L00–L99) of ICD-10-CM.

Related codes in the L23 category

L23.0 Allergic contact dermatitis due to metals Billable L23.1 Allergic contact dermatitis due to adhesives Billable L23.2 Allergic contact dermatitis due to cosmetics Billable L23.3 Allergic contact dermatitis due to drugs in contact with skin Billable L23.4 Allergic contact dermatitis due to dyes Billable L23.5 Allergic contact dermatitis due to other chemical products Billable L23.6 Allergic contact dermatitis due to food in contact with the skin Billable L23.7 Allergic contact dermatitis due to plants, except food Billable

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