C62.9 vs C79.82

C62.9 (Malignant neoplasm of testis, unspecified whether descended or undescended) compared with C79.82 (Secondary malignant neoplasm of genital organs), from the official CMS tabular data. C62.9 and C79.82 name the same anatomical site (testis) with a different neoplasm behavior. MedCoder-derived

Relationship

Informational

Neoplasm table relationship

C62.9

Malignant neoplasm of testis, unspecified whether descended or undescended

↔

C79.82

Secondary malignant neoplasm of genital organs

Same anatomical site, different neoplasm behavior.

Same site — secondary 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

Can these codes be reported together?

Same site, different neoplasm behavior. C62.9 and C79.82 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.

Side by side

	C62.9Malignant neoplasm of testis, unspecified whether descended or undescended	C79.82Secondary malignant neoplasm of genital organs
Billing status	Non-billable header Report instead: C62.90, C62.91, C62.92	Billable
Classification	C00-D49 — Neoplasms	C00-D49 — Neoplasms
Definition	Malignant neoplasm of testis, unspecified whether descended or undescended is a non-billable ICD-10-CM category code (C62.9).	Secondary malignant neoplasm of genital organs is a billable ICD-10-CM diagnosis code (C79.82).
Includes	malignant neoplasm of skin of male genital organs	—
Use additional code	code to identify any functional activity	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources