C17.1 (Malignant neoplasm of jejunum) compared with D13.39 (Benign neoplasm of other parts of small intestine), from the official CMS tabular data. C17.1 and D13.39 name the same anatomical site (intestine) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (intestine)
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. C17.1 and D13.39 name the same anatomical site (intestine) 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.
| C17.1Malignant neoplasm of jejunum | D13.39Benign neoplasm of other parts of small intestine | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of jejunum is a billable ICD-10-CM diagnosis code (C17.1). | Benign neoplasm of other parts of small intestine is a billable ICD-10-CM diagnosis code (D13.39). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources