C65 (Malignant neoplasm of renal pelvis) compared with D30.1 (Benign neoplasm of renal pelvis), from the official CMS tabular data. C65 and D30.1 name the same anatomical site (calyx) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (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. C65 and D30.1 name the same anatomical site (calyx) 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.
| C65Malignant neoplasm of renal pelvis | D30.1Benign neoplasm of renal pelvis | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of renal pelvis is a non-billable ICD-10-CM category code (C65). | Benign neoplasm of renal pelvis is a non-billable ICD-10-CM category code (D30.1). |
| Includes | malignant neoplasm of pelviureteric junction malignant neoplasm of renal calyces | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources