C41.1 (Malignant neoplasm of mandible) compared with D16.5 (Benign neoplasm of lower jaw bone), from the official CMS tabular data. C41.1 and D16.5 name the same anatomical site (alveolar) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (alveolar)
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. C41.1 and D16.5 name the same anatomical site (alveolar) 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.
| C41.1Malignant neoplasm of mandible | D16.5Benign neoplasm of lower jaw bone | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of mandible is a billable ICD-10-CM diagnosis code (C41.1). | Benign neoplasm of lower jaw bone is a billable ICD-10-CM diagnosis code (D16.5). |
| Includes | malignant neoplasm of cartilage (articular) (joint) malignant neoplasm of periosteum Malignant neoplasm of inferior maxilla Malignant neoplasm of lower jaw bone | Keratocyst of mandible Keratocystic odontogenic tumor of mandible |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources