D04.39 (Carcinoma in situ of skin of other parts of face) compared with D23.39 (Other benign neoplasm of skin of other parts of face), from the official CMS tabular data. D04.39 and D23.39 name the same anatomical site (ala nasi) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (ala nasi)
The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.
Source: CMS Table of Neoplasms
Same site, different neoplasm behavior. D04.39 and D23.39 name the same anatomical site (ala nasi) with a different neoplasm behavior.
From the CMS Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.
| D04.39Carcinoma in situ of skin of other parts of face | D23.39Other benign neoplasm of skin of other parts of face | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Carcinoma in situ of skin of other parts of face is a billable ICD-10-CM diagnosis code (D04.39). | Other benign neoplasm of skin of other parts of face is a billable ICD-10-CM diagnosis code (D23.39). |
| Includes | Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia | benign neoplasm of hair follicles benign neoplasm of sebaceous glands benign neoplasm of sweat glands |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources