C31
C31: Malignant neoplasm of accessory sinuses
Non-billable headerICD-10-CM
C31 is a non-billable header ICD-10-CM code for malignant neoplasm of accessory sinuses. It cannot be billed on its own: choose one of the more specific child codes below.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead C31
6 child codes. Green means billable.