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L23

Non-billable

Allergic contact dermatitis

L23 is the ICD-10-CM code for Allergic contact dermatitis. It is a non-billable category code — use a more specific child code such as L23.0 for billing.

Status
Header (non-billable)
Chapter
L00-L99
Subcodes
10
Edition
FY2026

L00-L99 Diseases of the skin and subcutaneous tissue

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)

Frequently asked questions

What is ICD-10 code L23?
L23 is the ICD-10-CM code for "Allergic contact dermatitis". It falls under L00-L99 Diseases of the skin and subcutaneous tissue.
Is L23 a billable code?
No — L23 is a non-billable header code. Use a more specific child code (such as L23.0) for billing.
What are the subcodes of L23?
L23 has 10 more specific child codes, including L23.0, L23.1, L23.2.
What is excluded from L23?
Excludes1 (not coded here): allergy NOS (T78.40); contact dermatitis NOS (L25.9); dermatitis NOS (L30.9).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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