CPT® Code 31070

The CPT® Code 31070 refers to a surgical procedure known as a frontal sinusotomy, specifically an external and simple approach, often described as a trephine operation. This procedure involves making a precise skin incision located above the eye, specifically on the inner aspect just beneath the eyebrow. The primary objective of this operation is to gain access to the frontal sinus, which is a cavity located within the frontal bone of the skull. To achieve this access, a trephine or perforator is utilized to remove a small disc of bone from the frontal bone, thereby creating an opening into the sinus. Once access is established, one or more catheters are inserted into the sinus to facilitate effective drainage of any accumulated fluids or infections. These catheters are strategically left in place to ensure ongoing drainage, and the surrounding subcutaneous tissue and skin are then carefully closed around the catheters to promote healing while maintaining the integrity of the surgical site.