L99
✓ Billable
Other disorders of skin and subcutaneous tissue in diseases classified elsewhere
ICD-10-CM · FY2026 · Diseases of the Skin and Subcutaneous Tissue
Code
L99
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.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- skin disorders in diabetes (E08-E13 with .62-)
- skin disorders in gonorrhea (A54.89)
- skin disorders in syphilis (A51.31, A52.79)
Code first
- underlying disease, such as:
- amyloidosis (E85.-)
Frequently asked questions
What is ICD-10 code L99?
ICD-10-CM code L99 represents Other disorders of skin and subcutaneous tissue in diseases classified elsewhere. It is a billable diagnosis code in the Diseases of the Skin and Subcutaneous Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is L99 billable?
Yes. L99 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is L99 in?
L99 belongs to the Diseases of the Skin and Subcutaneous Tissue chapter (L00–L99) of ICD-10-CM.
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