C79.6 (Secondary malignant neoplasm of ovary) compared with D07.39 (Carcinoma in situ of other female genital organs), from the official CMS tabular data. C79.6 and D07.39 name the same anatomical site (corpus) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — carcinoma in situ (corpus)
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. C79.6 and D07.39 name the same anatomical site (corpus) 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.
| C79.6Secondary malignant neoplasm of ovary | D07.39Carcinoma in situ of other female genital organs | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Secondary malignant neoplasm of ovary is a non-billable ICD-10-CM category code (C79.6). | Carcinoma in situ of other female genital organs is a billable ICD-10-CM diagnosis code (D07.39). |
| Includes | — | Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources