C75.1 (Malignant neoplasm of pituitary gland) compared with D35.2 (Benign neoplasm of pituitary gland), from the official CMS tabular data. C75.1 and D35.2 name the same anatomical site (fossa) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (fossa)
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. C75.1 and D35.2 name the same anatomical site (fossa) 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.
| C75.1Malignant neoplasm of pituitary gland | D35.2Benign neoplasm of pituitary gland | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of pituitary gland is a billable ICD-10-CM diagnosis code (C75.1). | Benign neoplasm of pituitary gland is a billable ICD-10-CM diagnosis code (D35.2). |
| 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