ICDwise
C04 ⚠ Non-billable

Malignant neoplasm of floor of mouth

ICD-10-CM · FY2026 · Neoplasms

Code
C04
System
ICD-10-CM
Billable
No — use specific code
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.

Frequently asked questions

What is ICD-10 code C04?
ICD-10-CM code C04 represents Malignant neoplasm of floor of mouth. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C04 billable?
No. C04 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C04 in?
C04 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.

Related codes in the C04 category

C04.0 Malignant neoplasm of anterior floor of mouth Billable C04.1 Malignant neoplasm of lateral floor of mouth Billable C04.8 Malignant neoplasm of overlapping sites of floor of mouth Billable C04.9 Malignant neoplasm of floor of mouth, unspecified Billable

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