D35.0 (Benign neoplasm of adrenal gland) compared with D44.1 (Neoplasm of uncertain behavior of adrenal gland), from the official CMS tabular data. D35.0 and D44.1 name the same anatomical site (adrenal) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (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. D35.0 and D44.1 name the same anatomical site (adrenal) 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.
| D35.0Benign neoplasm of adrenal gland | D44.1Neoplasm of uncertain behavior of adrenal gland | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of adrenal gland is a non-billable ICD-10-CM category code (D35.0). | Neoplasm of uncertain behavior of adrenal gland is a non-billable ICD-10-CM category code (D44.1). |
| 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