L02.521 (Furuncle right hand) compared with L02.522 (Furuncle left hand), from the official CMS tabular data. L02.521 and L02.522 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. L02.521 and L02.522 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| L02.521Furuncle right hand | L02.522Furuncle left hand | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | L00-L99 — Diseases of the skin and subcutaneous tissue | L00-L99 — Diseases of the skin and subcutaneous tissue |
| Definition | Furuncle right hand is a billable ICD-10-CM diagnosis code (L02.521). | Furuncle left hand is a billable ICD-10-CM diagnosis code (L02.522). |
| Use additional code | code to identify organism (B95-B96) code (B95-B97) to identify infectious agent. | code to identify organism (B95-B96) code (B95-B97) to identify infectious agent. |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources