C74.0 (Malignant neoplasm of cortex of adrenal gland) compared with C79.7 (Secondary malignant neoplasm of adrenal gland), from the official CMS tabular data. C74.0 and C79.7 name the same anatomical site (adrenal) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — secondary malignancy (adrenal)
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. C74.0 and C79.7 name the same anatomical site (adrenal) 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.
| C74.0Malignant neoplasm of cortex of adrenal gland | C79.7Secondary malignant neoplasm of adrenal gland | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of cortex of adrenal gland is a non-billable ICD-10-CM category code (C74.0). | Secondary malignant neoplasm of adrenal gland is a non-billable ICD-10-CM category code (C79.7). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources