D35.2 (Benign neoplasm of pituitary gland) compared with D44.3 (Neoplasm of uncertain behavior of pituitary gland), from the official CMS tabular data. D35.2 and D44.3 name the same anatomical site (craniobuccal pouch) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (craniobuccal pouch)
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. D35.2 and D44.3 name the same anatomical site (craniobuccal pouch) 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.
| D35.2Benign neoplasm of pituitary gland | D44.3Neoplasm of uncertain behavior of pituitary gland | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of pituitary gland is a billable ICD-10-CM diagnosis code (D35.2). | Neoplasm of uncertain behavior of pituitary gland is a billable ICD-10-CM diagnosis code (D44.3). |
| Use additional code | code to identify any functional activity | 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