ICD-10 Code C33

Malignant neoplasm of trachea

Version 2019 Billable Code Neoplasm Malignant Primary
Short Description:Malignant neoplasm of trachea
Long Description:Malignant neoplasm of trachea

Valid for Submission

ICD-10 C33 is a billable code used to specify a medical diagnosis of malignant neoplasm of trachea. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Code Classification

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

Information for Medical Professionals

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). The diagnosis code C33 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.


Convert C33 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 162.0 - Malignant neo trachea


The following clinical terms are approximate synonyms:

  • Acantholytic squamous cell carcinoma
  • Adenoid cystic carcinoma of trachea
  • Adenosquamous cell carcinoma
  • 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
  • Tumor of lower respiratory tract and mediastinum
  • Verrucous squamous cell carcinoma

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 for the code C33 are found in the tabular index:

    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.

    The Tabular must be reviewed for the complete diagnosis code.

    Neoplasm, neoplastic Malignant
    CaInSitu Benign Uncertain
    »cartilage (articular) (joint) NEC [See Also: Neoplasm, bone]
    »trachea (cartilage) (mucosa)

    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)
    • Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
    • What to Know about Brachytherapy (A Type of Internal Radiation Therapy) - NIH - Easy-to-Read (National Cancer Institute)

    [Read 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)

    [Read More]

    ICD-10 Footnotes

    General Equivalence Map Definitions
    The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

    • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
    • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
    • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

    Index of Diseases and Injuries Definitions

    • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
    • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
    • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
    • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
    • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
    • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
    • Inclusion terms - List of terms is included under some codes. 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.
    • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
    • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
    • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
    • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
    • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
    • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.