Category C31

Malignant neoplasm of accessory sinuses

Clinical Classification Guidelines

Specific Diagnosis Codes

Malignant neoplasm of maxillary sinus
C31.0
Malignant neoplasm of ethmoidal sinus
C31.1
Malignant neoplasm of frontal sinus
C31.2
Malignant neoplasm of sphenoid sinus
C31.3
Malignant neoplasm of overlapping sites of accessory sinuses
C31.8
Malignant neoplasm of accessory sinus, unspecified
C31.9