C06.9 (Malignant neoplasm of mouth, unspecified) compared with D37.04 (Neoplasm of uncertain behavior of the minor salivary glands), from the official CMS tabular data. C06.9 and D37.04 name the same anatomical site (salivary gland or duct) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (salivary gland or duct)
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. C06.9 and D37.04 name the same anatomical site (salivary gland or duct) with a different neoplasm behavior.
From the CMS/CDC 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.
| C06.9Malignant neoplasm of mouth, unspecified | D37.04Neoplasm of uncertain behavior of the minor salivary glands | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of mouth, unspecified is a billable ICD-10-CM diagnosis code (C06.9). | Neoplasm of uncertain behavior of the minor salivary glands is a billable ICD-10-CM diagnosis code (D37.04). |
| Includes | Malignant neoplasm of minor salivary gland, unspecified site Malignant neoplasm of oral cavity NOS | Neoplasm of uncertain behavior of submucosal salivary glands of lip Neoplasm of uncertain behavior of submucosal salivary glands of cheek Neoplasm of uncertain behavior of submucosal salivary glands of hard palate Neoplasm of uncertain behavior of submucosal salivary glands of soft palate |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources