Is C04 a billable code?
No. C04 is a header code that groups 4 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
C04: Malignant neoplasm of floor of mouth
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
C04 groups related diagnoses under malignant neoplasm of floor of mouth. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
C04 questions
What does C04 mean?
C04 is the ICD-10-CM code for Malignant neoplasm of floor of mouth. It is in chapter 2, Neoplasms (C00-D49).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.