2024 ICD-10-CM Diagnosis Code C01

Malignant neoplasm of base of tongue

ICD-10-CM Code:
ICD-10 Code for:
Malignant neoplasm of base of tongue
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Neoplasms
    • Malignant neoplasms of lip, oral cavity and pharynx
      • Malignant neoplasm of base of tongue

C01 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of base of tongue. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic tongue base (dorsal surface) or Neoplasm, neoplastic tongue fixed part NEC or Neoplasm, neoplastic tongue posterior (third) or Neoplasm, neoplastic tongue root or Neoplasm, neoplastic tongue surface (dorsal) base .

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Carcinoma of base of tongue
  • Carcinoma of supraglottis
  • Carcinoma of supraglottis
  • Carcinoma of supraglottis
  • Carcinoma of supraglottis
  • Carcinoma of tongue base - dorsal surface
  • Malignant neoplasm of base of tongue dorsal surface
  • Malignant tumor of base of tongue
  • Primary carcinoma of base of tongue
  • Primary carcinoma of larynx
  • Primary carcinoma of larynx
  • Primary carcinoma of supraglottis
  • Primary carcinoma of supraglottis
  • Primary carcinoma of tongue base - dorsal surface
  • Primary malignant neoplasm of base of tongue
  • Primary malignant neoplasm of dorsal surface of tongue
  • Primary squamous cell carcinoma of base of tongue
  • Primary squamous cell carcinoma of supraglottis
  • Primary tongue carcinoma
  • Primary tongue carcinoma

Clinical Classification

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Malignant neoplasm of dorsal surface of base of tongue
  • Malignant neoplasm of fixed part of tongue NOS
  • Malignant neoplasm of posterior third of tongue

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
  • code to identify:
  • alcohol abuse and dependence F10
  • history of tobacco dependence Z87.891
  • tobacco dependence F17
  • tobacco use Z72.0

Convert C01 to ICD-9-CM

  • ICD-9-CM Code: 141.0 - Mal neo tongue base

Table of Neoplasms

This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Neoplasm, neoplastic Malignant
CaInSitu Benign Uncertain
»Neoplasm, neoplastic
    »base (dorsal surface)
»Neoplasm, neoplastic
    »fixed part NEC
»Neoplasm, neoplastic
    »posterior (third)
»Neoplasm, neoplastic
»Neoplasm, neoplastic
    »surface (dorsal)

Patient Education

Oral Cancer

What is oral cancer?

Oral cancer is cancer of the mouth. It is a type of head and neck cancer. Most oral cancers are squamous cell cancers. They begin in the flat cells that cover the surfaces of your mouth, tongue, and lips. The cancer cells may spread into deeper tissue as the cancer grows.

Most oral cancers are related to tobacco use, heavy alcohol use, or an HPV infection.

Who is more likely to develop oral cancer?

Anyone can get oral cancer, but you are more likely to develop it if you:

  • Use tobacco or drink lots of alcohol. Your risk of developing oral cancer is even higher if you do both.
  • Are male.
  • Are over ago 40.
  • Have HPV.
  • Have a history of head or neck cancer.
  • Get frequent sun exposure (for lip cancer).

What are the symptoms of oral cancer?

The symptoms of oral cancer may include:

  • A white or red patch in your mouth
  • A lip or mouth sore that won't heal
  • Bleeding, pain, or numbness in the lip or mouth
  • Loose teeth or dentures that no longer fit well
  • Problems or pain with swallowing
  • A lump in your neck
  • Ear pain
  • Trouble moving your mouth or jaw
  • Swelling of the jaw
  • A sore throat or feeling that something is caught in the throat

If you have any of these symptoms for more than two weeks, see your health care provider or dentist. Oral cancer can spread quickly, so it's important to find it early.

How is oral cancer diagnosed?

To find out if you have oral cancer, your provider may use:

  • A physical exam of the lips and mouth.
  • An endoscopy.
  • A biopsy or other procedure to collect cells from the lip or oral cavity. The cells are viewed under a microscope to find out if they are abnormal.
  • Imaging tests.

What are the treatments for oral cancer?

The treatments for oral cancer include surgery, radiation therapy, or both. After surgery, some people also need chemotherapy to kill any cancer cells that are left.

Can oral cancer be prevented?

There are steps you can take to help prevent oral cancer:

  • Not smoking
  • Limiting alcohol use or not drinking at all
  • Getting regular dental exams

NIH: National Cancer Institute

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.