ICD-10 Code L02.93 – Carbuncle, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.93 – Carbuncle, unspecified
What it is
This code identifies a carbuncle when the site is not documented. A carbuncle is a deeper skin infection made up of connected boils, usually causing localized inflammation and drainage.
Clinical signs
Typical findings include a painful, swollen, red area with multiple draining points or pus. Clinical features vary; refer to documentation.
When to use this code
Use L02.93 when the provider documents a carbuncle but does not specify the body site. It also fits cases where the chart confirms a carbuncle and no more precise location is available. Check documentation if another abscess or skin infection is described.
Do not use for
Do not use this code for a furuncle, abscess with a documented site, or cellulitis without a carbuncle diagnosis. If the record names a specific location, code that site instead.
Coding tip
Confirm whether the note says “carbuncle” and whether the site is unspecified before assigning L02.93.