Non-Billable / Non-Specific Code
ICD-10-CM C04 is the diagnosis code for Malignant neoplasm of floor of mouth. This code falls under the section "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 — Neoplasms (C00-D49). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where C04 sits in the ICD-10-CM classification helps ensure proper coding:
No, C04 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
C04 is the ICD-10-CM diagnosis code for "Malignant neoplasm of floor of mouth". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C04 is located in Section C00-C14 — "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 of the ICD-10-CM Tabular List.
C04 has 4 sub-code(s) that provide more specific detail: C04.0, C04.1, C04.8, C04.9.
Use C04 when the patients documented diagnosis matches "Malignant neoplasm of floor of mouth" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Malignant neoplasm of floor of mouth is C04.
No, C04 is non-billable. Use a more specific sub-code for primary diagnosis billing.
C04 is in Chapter 2 of the ICD-10-CM Tabular List.
Yes, C04 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.