ICD-10-CM Code C33

Malignant neoplasm of trachea

Version 2021 Billable Code Neoplasm Malignant Primary

Valid for Submission

C33 is a billable code used to specify a medical diagnosis of malignant neoplasm of trachea. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code C33 might also be used to specify conditions or terms like acantholytic squamous cell carcinoma, adenoid cystic carcinoma of trachea, adenosquamous cell carcinoma, lymphoepithelial carcinoma, malignant neoplasm of carina of bronchus, malignant neoplasm of cartilage of trachea, etc

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic cartilage (articular) (joint) NEC [See Also: Neoplasm, bone] trachea or Neoplasm, neoplastic trachea (cartilage) (mucosa) or Neoplasm, neoplastic windpipe .

Short Description:Malignant neoplasm of trachea
Long Description:Malignant neoplasm of trachea

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code C33:

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:
  • exposure to environmental tobacco smoke Z77.22
  • exposure to tobacco smoke in the perinatal period P96.81
  • history of tobacco dependence Z87.891
  • occupational exposure to environmental tobacco smoke Z57.31
  • tobacco dependence F17
  • tobacco use Z72.0


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

  • Acantholytic squamous cell carcinoma
  • Adenoid cystic carcinoma of trachea
  • Adenosquamous cell carcinoma
  • Lymphoepithelial carcinoma
  • Malignant neoplasm of carina of bronchus
  • Malignant neoplasm of cartilage of trachea
  • Malignant neoplasm of mucosa of trachea
  • Malignant tumor of trachea
  • Neoplasm of carina
  • Primary acinar cell carcinoma of trachea
  • Primary adenocarcinoma of trachea
  • Primary adenosquamous carcinoma of trachea
  • Primary basaloid squamous cell carcinoma of trachea
  • Primary clear cell adenocarcinoma of trachea
  • Primary clear cell squamous cell carcinoma of trachea
  • Primary giant cell carcinoma of trachea
  • Primary lymphoepithelial carcinoma of trachea
  • Primary malignant epithelial neoplasm of trachea
  • Primary malignant neoplasm of carina
  • Primary malignant neoplasm of trachea
  • Primary mucinous adenocarcinoma of trachea
  • Primary mucinous cystadenocarcinoma of trachea
  • Primary mucoepidermoid carcinoma of trachea
  • Primary myoepithelial carcinoma of trachea
  • Primary papillary adenocarcinoma of trachea
  • Primary papillary squamous cell carcinoma of trachea
  • Primary salivary gland type carcinoma of trachea
  • Primary signet ring cell carcinoma of trachea
  • Primary solid carcinoma of trachea
  • Primary spindle cell carcinoma of trachea
  • Primary squamous cell adenoid carcinoma of trachea
  • Primary squamous cell carcinoma of trachea
  • Primary undifferentiated carcinoma of trachea
  • Primary verrucous carcinoma of trachea
  • Squamous cell carcinoma of trachea
  • Verrucous squamous cell carcinoma

Diagnostic Related Groups

The ICD-10 code C33 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2021.


Convert C33 to ICD-9

  • 162.0 - Malignant neo trachea

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)
      • Malignant neoplasm of trachea (C33)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Table of Neoplasms

The code C33 is included 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
  »cartilage (articular) (joint) NEC [See Also: Neoplasm, bone]
»Neoplasm, neoplastic
  »trachea (cartilage) (mucosa)
»Neoplasm, neoplastic

Information for Patients

Head and Neck Cancer

Head and neck cancer includes cancers of the mouth, nose, sinuses, salivary glands, throat, and lymph nodes in the neck. Most begin in the moist tissues that line the mouth, nose, and throat. Symptoms include

  • A lump or sore that does not heal
  • A sore throat that does not go away
  • Trouble swallowing
  • A change or hoarseness in the voice

Head and neck cancers are twice as common in men. Using tobacco or alcohol increases your risk. In fact, around 75 percent of head and neck cancers are linked to tobacco use, including smoking and smokeless tobacco. Infection with HPV is a risk factor for some head and neck cancers.

To diagnose head and neck cancer, your doctor will do a physical exam and diagnostic tests. You will have a biopsy, where a sample of tissue is taken out and examined under a microscope. It is the only test that can tell for sure if you have cancer.

If found early, these cancers are often curable. Treatments may include surgery, radiation therapy, chemotherapy, or a combination. Treatments can affect eating, speaking or even breathing, so patients may need rehabilitation.

NIH: National Cancer Institute

  • After chemotherapy - discharge (Medical Encyclopedia)
  • Glomus jugulare tumor (Medical Encyclopedia)
  • Mouth and neck radiation - discharge (Medical Encyclopedia)
  • Neck dissection (Medical Encyclopedia)
  • Neck dissection - discharge (Medical Encyclopedia)
  • Swallowing problems (Medical Encyclopedia)

[Learn More]

Tracheal Disorders

Also called: Windpipe disorders

Your trachea, or windpipe, is one part of your airway system. Airways are pipes that carry oxygen-rich air to your lungs. They also carry carbon dioxide, a waste gas, out of your lungs.

When you inhale, air travels from your nose, through your larynx, and down your windpipe. The windpipe splits into two bronchi that enter your lungs.

Problems with the trachea include narrowing, inflammation, and some inherited conditions. You may need a procedure called a tracheostomy to help you breathe if you have swallowing problems, or have conditions that affect coughing or block your airways. You might also need a tracheostomy if you are in critical care and need to be on a breathing machine.

NIH: National Heart, Lung, and Blood Institute

  • Blockage of upper airway (Medical Encyclopedia)
  • Swallowing problems (Medical Encyclopedia)
  • Tracheitis (Medical Encyclopedia)
  • Tracheoesophageal fistula and esophageal atresia repair (Medical Encyclopedia)
  • Tracheomalacia - acquired (Medical Encyclopedia)
  • Tracheomalacia - congenital (Medical Encyclopedia)
  • Tracheostomy (Medical Encyclopedia)

[Learn More]