ICD-10 Code C02.0 – Malignant neoplasm of dorsal surface of tongue (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C02.0 – Malignant neoplasm of dorsal surface of tongue
What it is
C02.0 identifies a malignant tumor arising on the dorsal surface of the tongue. Use it when documentation specifies cancer of the top surface of the tongue, not the base or other oral sites.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include a visible tongue lesion, ulceration, pain, bleeding, or difficulty speaking or swallowing, but the diagnosis should be supported by provider documentation and pathology when available.
When to use this code
Use this code when the record clearly states malignant neoplasm of the dorsal surface of the tongue, including biopsy-confirmed cancer or a documented clinical diagnosis. It is also appropriate when the provider identifies this exact tongue subsite in assessment, problem list, or operative note.
If the note only says “tongue cancer” or names a different tongue location, check documentation before coding. Site specificity matters because other tongue subsites are coded separately.
Do not use for
Do not use C02.0 for cancers of the base, tip, ventral surface, or other parts of the tongue. Also avoid it when the lesion is benign, dysplastic, or the exact site is not documented.
Coding tip
Confirm the anatomic site in the pathology, operative, or oncology note before assigning C02.0.