CPT® Code 61781

Stereotactic computer-assisted (navigational) procedure; cranial, intradural (List separately in addition to code for primary procedure)

Stereotactic procedures are advanced surgical techniques that utilize a defined three-dimensional coordinate system, facilitated by computer technology, to enhance the precision of interventions performed on the brain. This method allows for the execution of complex procedures with minimal invasiveness, often eliminating the need for general anesthesia. Instead, local anesthetics are administered at specific pin sites on the skull, enabling the physician to create smaller incisions and openings in the bone. The process begins with the placement of a stereotactic ring over the patient's skull, where pins are inserted to secure the head in a fixed position. Following this, a localizing ring is temporarily affixed to the stereotactic ring, and a CT scan is conducted to gather critical imaging data. The resulting information is processed through specialized navigational software, which generates precise coordinates that guide the surgeon to the optimal site for incision and bone cuts. This meticulous approach not only aids in accurately locating lesions or targeted areas within the brain but also supports the execution of the definitive procedure that follows. It is important to note that CPT® Code 61781 is specifically designated for stereotactic computer-assisted procedures performed within or beneath the dura mater (intradural), while CPT® Code 61782 is used for procedures conducted outside the dura mater (extradural).