CPT® Code 61540

Craniotomy with elevation of bone flap; for lobectomy, other than temporal lobe, partial or total, without electrocorticography during surgery

The CPT® Code 61540 refers to a surgical procedure known as craniotomy with elevation of the bone flap, specifically performed for lobectomy of the brain, excluding the temporal lobe. This procedure involves the partial or total removal of a lobe of the brain and is conducted without the use of electrocorticography during the surgery. Electrocorticography, also known as brain mapping, is a technique that records electrical activity from the cerebral cortex to help delineate the boundaries of the area responsible for epileptic seizures. In this case, the absence of electrocorticography indicates that the surgeon relies on anatomical landmarks and preoperative imaging rather than real-time brain activity monitoring to guide the resection. The procedure begins with an incision in the scalp, followed by the creation of scalp flaps and burr holes in the skull. The bone flap is then elevated to access the underlying brain tissue. The dura mater, a protective membrane covering the brain, is opened to allow for the surgical intervention. The surgical steps involve careful dissection and removal of brain tissue, including critical structures such as the hippocampus and amygdala, while preserving vital blood vessels and surrounding tissues. The procedure concludes with the repair of the dura, replacement of the bone flap, and closure of the scalp layers. This code is essential for accurately documenting and billing for the surgical intervention performed without the aid of electrocorticography.