C62.0 (Malignant neoplasm of undescended testis) compared with D49.59 (Neoplasm of unspecified behavior of other genitourinary organ), from the official CMS tabular data. C62.0 and D49.59 name the same anatomical site (testis) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — primary malignancy (testis)
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. D49.59 and C62.0 name the same anatomical site (testis) 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.
| C62.0Malignant neoplasm of undescended testis | D49.59Neoplasm of unspecified behavior of other genitourinary organ | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of undescended testis is a non-billable ICD-10-CM category code (C62.0). | Neoplasm of unspecified behavior of other genitourinary organ is a billable ICD-10-CM diagnosis code (D49.59). |
| Includes | malignant neoplasm of skin of male genital organs Malignant neoplasm of ectopic testis Malignant neoplasm of retained testis | 'growth' NOS neoplasm NOS new growth NOS tumor NOS |
| Use additional code | code to identify any functional activity | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources