C79.82 (Secondary malignant neoplasm of genital organs) compared with D40.8 (Neoplasm of uncertain behavior of other specified male genital organs), from the official CMS tabular data. C79.82 and D40.8 name the same anatomical site (cord) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (cord)
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. C79.82 and D40.8 name the same anatomical site (cord) 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.
| C79.82Secondary malignant neoplasm of genital organs | D40.8Neoplasm of uncertain behavior of other specified male genital organs | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Secondary malignant neoplasm of genital organs is a billable ICD-10-CM diagnosis code (C79.82). | Neoplasm of uncertain behavior of other specified male genital organs is a billable ICD-10-CM diagnosis code (D40.8). |
| Includes | — | Neoplasm of uncertain behavior of skin of male genital organs |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources