ICD-10 Code L03.01 – Cellulitis of finger (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.01 – Cellulitis of finger
What it is
L03.01 identifies cellulitis limited to a finger. It describes a bacterial skin and soft tissue infection causing localized inflammation of the finger.
Clinical signs
Typical findings include redness, warmth, swelling, tenderness, and possible spread along the finger. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents cellulitis of a finger, including infection of one digit only. It fits cases where the infection is confined to the finger and not described as hand, nail, or paronychia involvement. Check documentation if the site is unclear.
Do not use for
Do not use it for cellulitis of the hand, toe, or other body sites. Avoid it when the record describes paronychia, abscess, or another specific diagnosis instead of cellulitis.
Coding tip
Confirm the exact anatomic site in the note; cellulitis of the finger should be coded only when the finger is specifically documented.