C04

Non-billable

Malignant neoplasm of floor of mouth

C04 is the ICD-10-CM code for Malignant neoplasm of floor of mouth. It is a non-billable category code — use a more specific child code such as C04.0 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Subcodes
4
Edition
FY2026

C00-D49 Neoplasms

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 C04?
C04 is the ICD-10-CM code for "Malignant neoplasm of floor of mouth". It falls under C00-D49 Neoplasms.
Is C04 a billable code?
No — C04 is a non-billable header code. Use a more specific child code (such as C04.0) for billing.
What are the subcodes of C04?
C04 has 4 more specific child codes, including C04.0, C04.1, C04.8.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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