ICD-10 Diagnosis Code C31.9

Malignant neoplasm of accessory sinus, unspecified

Diagnosis Code C31.9

ICD-10: C31.9
Short Description: Malignant neoplasm of accessory sinus, unspecified
Long Description: Malignant neoplasm of accessory sinus, unspecified
This is the 2017 version of the ICD-10-CM diagnosis code C31.9

Valid for Submission
The code C31.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)
      • Malignant neoplasm of accessory sinuses (C31)

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.
  • 160.9 - Mal neo access sinus NOS

  • Malignant melanoma of accessory sinus
  • Malignant neoplasm of nasal cavities, middle ear and accessory sinuses
  • Malignant tumor of nasal sinuses
  • Primary adenocarcinoma of accessory sinus
  • Primary carcinoma of accessory sinus
  • Primary malignant neoplasm of accessory sinus
  • Primary squamous cell carcinoma of accessory sinus
  • Undifferentiated carcinoma of nasal sinus

Information for Patients

Nasal Cancer

Also called: Cancer of the nasal cavity, Cancer of the paranasal sinus

Your paranasal sinuses are small hollow spaces around the nose. They are lined with cells that make mucus, which keeps your nose from drying out. The nasal cavity is the passageway just behind your nose. Air passes through it on the way to your throat as you breathe.

Cancer of the nasal cavity and paranasal sinuses is rare. You are at greater risk if you are

  • Male and over 40 years old
  • Exposed to certain workplace chemicals
  • Infected with HPV
  • A smoker

There may be no symptoms at first, and later symptoms can be like those of infections. Doctors diagnose nasal cancer with imaging tests, lighted tube-like instruments that look inside the nose, and biopsies. Treatment options include surgery, radiation, and chemotherapy.

NIH: National Cancer Institute

  • After chemotherapy - discharge
  • Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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