C31 — ICD-10-CM Diagnosis Codes
- C31 Malignant neoplasm of accessory sinuses
- C31.0 Malignant neoplasm of maxillary sinus billable
- C31.1 Malignant neoplasm of ethmoidal sinus billable
- C31.2 Malignant neoplasm of frontal sinus billable
- C31.3 Malignant neoplasm of sphenoid sinus billable
- C31.8 Malignant neoplasm of overlapping sites of accessory sinuses billable
- C31.9 Malignant neoplasm of accessory sinus, unspecified billable