A51.31 vs L99
A51.31 (Condyloma latum) compared with L99 (Other disorders of skin and subcutaneous tissue in diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. L99 carries an Excludes1 note covering A51.31: “skin disorders in syphilis (A51.31, A52.79)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| A51.31Condyloma latum | L99Other disorders of skin and subcutaneous tissue in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) |
| Definition | Condyloma latum is a billable ICD-10-CM diagnosis code (A51.31). | Other disorders of skin and subcutaneous tissue in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (L99). |
| Code first | — | underlying disease, such as: amyloidosis (E85.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources