L02.421 (Furuncle of right axilla) compared with L02.422 (Furuncle of left axilla), from the official CMS tabular data. L02.421 and L02.422 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. L02.421 and L02.422 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.
| L02.421Furuncle of right axilla | L02.422Furuncle of left axilla | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) |
| Definition | Furuncle of right axilla is a billable ICD-10-CM diagnosis code (L02.421). | Furuncle of left axilla is a billable ICD-10-CM diagnosis code (L02.422). |
| 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