D30.1 (Benign neoplasm of renal pelvis) compared with D49.51 (Neoplasm of unspecified behavior of kidney), from the official CMS tabular data. D30.1 and D49.51 name the same anatomical site (calyx) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — unspecified behavior (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. D30.1 and D49.51 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.
| D30.1Benign neoplasm of renal pelvis | D49.51Neoplasm of unspecified behavior of kidney | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of renal pelvis is a non-billable ICD-10-CM category code (D30.1). | Neoplasm of unspecified behavior of kidney is a non-billable ICD-10-CM category code (D49.51). |
| Includes | — | 'growth' NOS neoplasm NOS new growth NOS tumor NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources