C79.0 (Secondary malignant neoplasm of kidney and renal pelvis) compared with D09.19 (Carcinoma in situ of other urinary organs), from the official CMS tabular data. C79.0 and D09.19 name the same anatomical site (calyx) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — carcinoma in situ (calyx)
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. C79.0 and D09.19 name the same anatomical site (calyx) 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.
| C79.0Secondary malignant neoplasm of kidney and renal pelvis | D09.19Carcinoma in situ of other urinary organs | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Secondary malignant neoplasm of kidney and renal pelvis is a non-billable ICD-10-CM category code (C79.0). | Carcinoma in situ of other urinary organs is a billable ICD-10-CM diagnosis code (D09.19). |
| 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