C08.1 vs D37.031

C08.1 (Malignant neoplasm of sublingual gland) compared with D37.031 (Neoplasm of uncertain behavior of the sublingual salivary glands), from the official CMS tabular data. C08.1 and D37.031 name the same anatomical site (salivary gland or duct) with a different neoplasm behavior.

Relationship

Informational

Neoplasm table relationship

C08.1

Malignant neoplasm of sublingual gland

↔

D37.031

Neoplasm of uncertain behavior of the sublingual salivary glands

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

Can these codes be reported together?

Same site, different neoplasm behavior. C08.1 and D37.031 name the same anatomical site (salivary gland or duct) 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.

Side by side

	C08.1Malignant neoplasm of sublingual gland	D37.031Neoplasm of uncertain behavior of the sublingual salivary glands
Billing status	Billable	Billable
Classification	C00-D49 — Neoplasms	C00-D49 — Neoplasms
Definition	Malignant neoplasm of sublingual gland is a billable ICD-10-CM diagnosis code (C08.1).	Neoplasm of uncertain behavior of the sublingual salivary glands is a billable ICD-10-CM diagnosis code (D37.031).
Includes	malignant neoplasm of salivary ducts	—
Use additional code	code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22)	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources