C31 Malignant neoplasm of accessory sinuses

Non-billable header with 6 child codes.

Codes under C31

• 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
• C31.9 Malignant neoplasm of accessory sinus, unspecified

Nearby codes

• C31 Malignant neoplasm of accessory sinuses (this code)
• 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