L23.9
✓ Billable
Allergic contact dermatitis, unspecified cause
ICD-10-CM · FY2026 · Diseases of the Skin and Subcutaneous Tissue
Code
L23.9
System
ICD-10-CM
Billable
Yes — valid for submission
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.
Frequently asked questions
What is ICD-10 code L23.9?
ICD-10-CM code L23.9 represents Allergic contact dermatitis, unspecified cause. It is a billable diagnosis code in the Diseases of the Skin and Subcutaneous Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is L23.9 billable?
Yes. L23.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is L23.9 in?
L23.9 belongs to the Diseases of the Skin and Subcutaneous Tissue chapter (L00–L99) of ICD-10-CM.
Related codes in the L23 category
L23
Allergic contact dermatitis
Non-billable
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
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