2026 ICD-10-CM Diagnosis Code C08.1Malignant neoplasm of sublingual gland

ICD-10-CM Codes›C00–D49›C00-C14›C08

ICD-10-CM C08.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C08.1 is a billable ICD-10-CM diagnosis code for malignant neoplasm of sublingual gland. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 146 through 148. Coders also document this condition as carcinoma of sublingual gland. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Head and neck cancers - salivary gland.

Code Identity

ICD-10-CM Code
C08.1
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of sublingual gland
Short Description
Malignant neoplasm of sublingual gland
Same as the full description in the CMS dataset.
Parent Code
C08
Malignant neoplasm of other and unspecified major salivary glands

Code Classification

ChapterC00–D49Neoplasms
SectionC00-C14Malignant neoplasms of lip, oral cavity and pharynx
CategoryC08Malignant neoplasm of other and unspecified major salivary glands
This CodeC08.1Malignant neoplasm of sublingual gland

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Carcinoma of sublingual gland
  • Malignant neoplasm of sublingual gland
  • Primary adenocarcinoma of sublingual gland
  • Primary carcinoma of sublingual gland
  • Primary malignant neoplasm of sublingual gland
  • Primary squamous cell carcinoma of sublingual gland

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO004
Head and neck cancers - salivary gland
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
salivary gland or duct (major) › sublingualC08.1C79.89D00.00D11.7D37.031D49.0
sublingual › gland or ductC08.1C79.89D00.00D11.7D37.031D49.0

Patient EducationClinical

Salivary Gland Cancer

Your salivary glands make saliva - sometimes called spit - and empty it into your mouth through openings called ducts. Saliva makes your food moist, which helps you chew and swallow. It helps you digest your food. It also cleans your mouth and contains antibodies that can kill germs.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C08.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
142.2 Malig neo sublingual
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C08.1Overview

Is C08.1 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of sublingual gland on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C08.1 group to?

When malignant neoplasm of sublingual gland is the principal diagnosis on an inpatient stay, it groups to MS-DRG 146, 147, 148, with relative weights from 0.7971 to 2.1174 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C08.1?

Under the General Equivalence Mappings, malignant neoplasm of sublingual gland converts to ICD-9-CM 142.2 (malig neo sublingual). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.