ICD-10 Code C08.1 – Malignant neoplasm of sublingual gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C08.1 – Malignant neoplasm of sublingual gland
What it is
C08.1 identifies a malignant tumor arising in the sublingual gland, one of the major salivary glands beneath the tongue. Use it when documentation specifies cancer of that gland.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings may include a mass in the floor of the mouth, swelling, pain, or difficulty with speech or swallowing.
When to use this code
Use C08.1 when the provider documents primary malignant neoplasm of the sublingual gland, including confirmed carcinoma or other malignant histology in that site. It is also appropriate when the record clearly localizes the malignancy to the sublingual gland. If the site is uncertain or another salivary gland is named, check documentation.
Do not use for
Do not use this code for benign sublingual gland tumors, inflammatory conditions, or cancers of other salivary glands. If the documentation only says “salivary gland cancer” without specifying the sublingual gland, check documentation.
Coding tip
Code the documented site exactly; sublingual gland malignancy is not interchangeable with other major salivary gland codes.