ICD-10 Diagnosis Code C09.0

Malignant neoplasm of tonsillar fossa

Diagnosis Code C09.0

ICD-10: C09.0
Short Description: Malignant neoplasm of tonsillar fossa
Long Description: Malignant neoplasm of tonsillar fossa
This is the 2019 version of the ICD-10-CM diagnosis code C09.0

Valid for Submission
The code C09.0 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
      • Malignant neoplasm of tonsil (C09)

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
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.
  • 146.1 - Mal neo tonsillar fossa

  • Malignant tumor of tonsillar fossa
  • Neoplasm of tonsillar fossa
  • Primary malignant neoplasm of lateral wall of oropharynx
  • Primary malignant neoplasm of tonsil
  • Primary malignant neoplasm of tonsillar fossa

Table of Neoplasms

The code C09.0 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
»fossa (of)
»glossopharyngeal sulcus
»tonsillar fossa

Information for Patients

Throat Cancer

Also called: Hypopharyngeal cancer, Laryngeal cancer, Laryngopharyngeal cancer, Nasopharyngeal cancer, Oropharyngeal cancer, Pharyngeal cancer

Throat cancer is a type of head and neck cancer. Throat cancer has different names, depending on which part of the throat is affected. The different parts of your throat are called the oropharynx, the hypopharynx, the nasopharynx, and the larynx, or voice box.

The main risk factors for throat cancer are using tobacco heavy drinking. Certain types of throat cancer also have other risk factors. For example, having HPV is a risk factor for oropharyngeal cancer.

Symptoms of throat cancer may include

  • A sore throat that does not go away
  • A lump in the neck
  • Pain or ringing in the ears
  • Trouble swallowing
  • Ear pain

To diagnose throat cancers, doctors may do a physical exam and history, imaging tests, and a biopsy. You may also need other tests, depending on the type of cancer. Treatments include surgery, radiation therapy, and chemotherapy. Treatment for some types of throat cancer may also include targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells.

NIH: National Cancer Institute

  • Laryngectomy (Medical Encyclopedia)
  • Swallowing problems (Medical Encyclopedia)
  • Throat or larynx cancer (Medical Encyclopedia)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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