C79.8 (Secondary malignant neoplasm of other specified sites) compared with D36.7 (Benign neoplasm of other specified sites), from the official CMS tabular data. C79.8 and D36.7 name the same anatomical site (abdomen) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (abdomen)
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. C79.8 and D36.7 name the same anatomical site (abdomen) 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.
| C79.8Secondary malignant neoplasm of other specified sites | D36.7Benign neoplasm of other specified sites | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Secondary malignant neoplasm of other specified sites is a non-billable ICD-10-CM category code (C79.8). | Benign neoplasm of other specified sites is a billable ICD-10-CM diagnosis code (D36.7). |
| Includes | — | Benign neoplasm of back NOS Benign neoplasm of nose NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources