C31.9 MALIGNANT NEOPLASM OF ACCESSORY SINUS, UNSPECIFIED

Home > ICD-10 List > Neoplasms > Malignant neoplasms of respiratory and intrathoracic organs (C30-C39) > Malignant neoplasm of accessory sinuses (C31) > C31.9

Code Information

Diagnosis Code: C31.9

Short Description: Malignant neoplasm of accessory sinus, unspecified

Long Description: Malignant neoplasm of accessory sinus, unspecified

The code C31.9 is VALID for claim submission

Code Classification:

Neoplasms (C00–D49)
- Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)
  - Malignant neoplasm of accessory sinuses (C31)
    - C31.9 Malignant neoplasm of accessory sinus, unspecified

Code Version: 2022 ICD-10-CM

Synonyms

Adenocarcinoma of accessory sinus
Carcinoma of nasal cavity
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 malignant neoplasm of nasal cavity
Primary squamous cell carcinoma of accessory sinus
Primary squamous cell carcinoma of accessory sinus
Primary squamous cell carcinoma of nasal cavity
Primary squamous cell carcinoma of nasal cavity and paranasal sinus
Primary undifferentiated carcinoma of nasal sinus
Squamous cell carcinoma of nose
Undifferentiated carcinoma of nasal sinus

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
C31.9		160.9	Mal neo access sinus NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
C31	Malignant neoplasm of accessory sinuses
C31.0	Malignant neoplasm of maxillary sinus
C31.1	Malignant neoplasm of ethmoidal sinus
C31.2	Malignant neoplasm of frontal sinus
C31.3	Malignant neoplasm of sphenoid sinus
C31.8	Malignant neoplasm of overlapping sites of accessory sinuses

This page was last updated on: 10/1/2023

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