Is C04.1 a billable ICD-10 code?

Yes. C04.1 (Malignant neoplasm of lateral floor of mouth) is billable and can be used for insurance claims. Always verify payer-specific requirements.

C04.1 ✓ Billable

Malignant neoplasm of lateral floor of mouth

Q: What is ICD-10 code C04.1?

ICD-10-CM code C04.1 stands for "Malignant neoplasm of lateral floor of mouth". It is a billable code in the Neoplasms chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Neoplasms

Code

C04.1

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.

Frequently asked questions

What is ICD-10 code C04.1?

ICD-10-CM code C04.1 represents Malignant neoplasm of lateral floor of mouth. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.

Is C04.1 billable?

Yes. C04.1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is C04.1 in?

C04.1 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.

Related codes in the C04 category

C04 Malignant neoplasm of floor of mouth Non-billable C04.0 Malignant neoplasm of anterior 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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