CPT® Code 61544

The procedure described by CPT® Code 61544 involves a craniotomy with elevation of a bone flap specifically for the excision or coagulation of the choroid plexus. The choroid plexus is a network of blood vessels located within the four ventricles of the brain, playing a crucial role in the production of cerebrospinal fluid (CSF). This fluid is essential for cushioning the brain, maintaining intracranial pressure, and facilitating the exchange of nutrients and waste. The choroid plexus is composed of capillaries that are separated from the ventricular spaces by specialized choroid epithelial cells, which filter blood to produce CSF. The excision or coagulation of the choroid plexus is typically indicated for certain types of hydrocephalus, a condition characterized by an accumulation of CSF within the ventricles, leading to increased intracranial pressure. The surgical procedure begins with an incision in the skin and the creation of scalp flaps, followed by the drilling of burr holes in the skull. A craniotome or saw is then used to cut the bone between these burr holes, allowing for the elevation of a bone flap. After the bone flap is lifted, the dura mater, which is the outermost layer of the protective covering of the brain, is opened and retracted to access the underlying brain tissue. During the procedure, careful dissection of the brain tissue is performed to avoid damaging critical structures. The surgeon then enters the ventricular system to excise a portion of the choroid plexus or to destroy it through coagulation techniques, such as electrocautery or laser. Following the excision or coagulation, the dura is closed, the bone flap is replaced and secured using sutures, wires, or miniplates and screws, and the overlying muscle and skin are repaired in layers. This meticulous approach ensures that the integrity of the brain and surrounding structures is maintained while addressing the underlying condition effectively.