C01
✓ Billable
Malignant neoplasm of base of tongue
ICD-10-CM · FY2026 · Neoplasms
Code
C01
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- 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)
Frequently asked questions
What is ICD-10 code C01?
ICD-10-CM code C01 represents Malignant neoplasm of base of tongue. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C01 billable?
Yes. C01 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is C01 in?
C01 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →