Valid for Submission
C31.3 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of sphenoid sinus. The code C31.3 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code C31.3 might also be used to specify conditions or terms like malignant melanoma of accessory sinus, malignant melanoma of sphenoidal sinus, malignant tumor of sphenoid sinus, primary adenocarcinoma of accessory sinus, primary adenocarcinoma of sphenoidal sinus , primary carcinoma of sphenoidal sinus, etc.
The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: sinus (accessory) sphenoid or sphenoid or sphenoid sinus .
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Malignant melanoma of accessory sinus
- Malignant melanoma of sphenoidal sinus
- Malignant tumor of sphenoid sinus
- Primary adenocarcinoma of accessory sinus
- Primary adenocarcinoma of sphenoidal sinus
- Primary carcinoma of sphenoidal sinus
- Primary malignant neoplasm of sphenoidal sinus
- Primary squamous cell carcinoma of accessory sinus
- Primary squamous cell carcinoma of sphenoidal sinus
Convert C31.3 to ICD-9 Code
Table of Neoplasms
The code C31.3 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.
Information for Patients
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
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