Neurosurgery Coding Alert

Question: For a patient diagnosed with left frontal basilar extra-axial tumor, our surgeon did the following procedures:Left bifrontal osteoplastic craniotomyExenteration frontal sinusesRemoval of basal tumorPericranial pedicle flap closure of frontal and ethmoid sinus with cranioplastyThe operative note reads as follows:"After infiltration of the scalp, a bicoronal scalp incision was made behind the hairline. It was on the level of the zygomatic arch on the left and just above the zygomatic arch on the right. This was taken down through subcutaneous tissues and galea as well as pericranium in the midline. We went through galea sparing temporalis muscle out to the right and left. The tissue was sharply divided allowing us to progressively reflect the bicoronal scalp flap anteriorly. Pericranium was reflected with the scalp flap in the midline down to the supraorbital rims. The scalp was covered with moist gauze and held up with fish hooks....The microscope was brought into [...]