ICD-10 Code L03.019 – Cellulitis of unspecified finger (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.019 – Cellulitis of unspecified finger
What it is
This code identifies cellulitis affecting a finger when the record does not specify which finger is involved. It refers to a bacterial skin and soft tissue infection of the finger.
Clinical signs
Typical findings include localized redness, swelling, warmth, tenderness, and sometimes pain of the finger. Clinical features vary; refer to documentation.
When to use this code
Use L03.019 when the provider documents cellulitis of a finger but does not name the specific digit. It also fits notes that describe finger cellulitis without laterality or more precise site detail. If the record identifies a different anatomic site, code that site instead.
Do not use for
Do not use this code for paronychia, felon, or infection limited to the nail fold unless cellulitis is documented. Do not assume a specific finger when the documentation is nonspecific.
Coding tip
Check the note for the exact finger and site detail; if present, code more specifically than L03.019.