D26.1 (Other benign neoplasm of corpus uteri) compared with D39.0 (Neoplasm of uncertain behavior of uterus), from the official CMS tabular data. D26.1 and D39.0 name the same anatomical site (corpus) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (corpus)
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. D26.1 and D39.0 name the same anatomical site (corpus) 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.
| D26.1Other benign neoplasm of corpus uteri | D39.0Neoplasm of uncertain behavior of uterus | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Other benign neoplasm of corpus uteri is a billable ICD-10-CM diagnosis code (D26.1). | Neoplasm of uncertain behavior of uterus is a billable ICD-10-CM diagnosis code (D39.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources