C79.0 (Secondary malignant neoplasm of kidney and renal pelvis) compared with D30.0 (Benign neoplasm of kidney), from the official CMS tabular data. C79.0 and D30.0 name the same anatomical site (kidney) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (kidney)
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 D30.0 name the same anatomical site (kidney) with a different neoplasm behavior.
From the CMS/CDC 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 | D30.0Benign neoplasm of kidney | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Secondary malignant neoplasm of kidney and renal pelvis is a non-billable ICD-10-CM category code (C79.0). | Benign neoplasm of kidney is a non-billable ICD-10-CM category code (D30.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources