Billable / Specific Code
ICD-10-CM C01 is the diagnosis code for Malignant neoplasm of base of tongue. This code falls under the section "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 — Neoplasms (C00-D49). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where C01 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C01 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C01 is the ICD-10-CM diagnosis code for "Malignant neoplasm of base of tongue". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C01 is located in Section C00-C14 — "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 of the ICD-10-CM Tabular List.
Use C01 when the patients documented diagnosis matches "Malignant neoplasm of base of tongue" 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 base of tongue is C01.
Yes, C01 can be used as a primary diagnosis code since it is billable and specific.
C01 is in Chapter 2 of the ICD-10-CM Tabular List.
Yes, C01 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.