ICD-10-CM · Chapter 2 · C00-D49
C01 Malignant neoplasm of base of tongue
Includes
- Malignant neoplasm of dorsal surface of base of tongue
- Malignant neoplasm of fixed part of tongue NOS
- Malignant neoplasm of posterior third of tongue
Use Additional Code
- code to identify:
- alcohol abuse and dependence (F10.-)
- history of tobacco dependence (Z87.891)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit C01 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026