ICD-10 Code L03.012 – Cellulitis of left finger (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.012 – Cellulitis of left finger
What it is
L03.012 identifies cellulitis limited to the left finger. It describes an acute bacterial infection of the skin and subcutaneous tissue in that specific location.
Clinical signs
Typical findings include localized redness, warmth, swelling, and tenderness of the left finger. Clinical features vary; refer to documentation if the record does not clearly describe infection.
When to use this code
Use this code when the provider documents cellulitis affecting a left finger and the laterality is clear. It may apply to a single digit infection, even if the exact finger is not further specified. If the note only says “finger cellulitis” or laterality is unclear, check documentation before coding.
Do not use for
Do not use L03.012 for cellulitis of the hand, nail fold infection, or noninfectious swelling. If the condition is a different site or the documentation is nonspecific, choose the more accurate code or check documentation.
Coding tip
Verify that the record states “left” finger, because laterality drives this code.