Neurosurgery is surgery of the nervous system. A neurological surgeon, or neurosurgeon, is a specialist who is trained in surgery of the nervous system, and can perform surgery on the brain, spinal cord, or other parts of the nervous system. This specialist is sometimes called a brain surgeon. The neurosurgeon also works with patients to diagnose, evaluate, and treat diseases or disorders of the nervous system, and aids in critical care of patients before, during and after surgery.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are Spondylolisthesis, Spinal Stenosis, Spinal Injury, Herniated Disc, brain tumors, stroke, Spinal Cord Tumors, Scoliosis, epilepsy, Spinal Infection, Spinal Discectomy, Spinal Deformity, brain tumor, coma, seizure, Alzheimer's disease, cerebral palsy, meningitis, multiple sclerosis, and Parkinson's disease.

Once properly diagnosed, practitioners can perform numerous procedures on patients including Disc Disease / Surgery, Back / Spine Surgery , Invasive Disc Surgery, Kyphosis Surgery, Laminectomy, Deep Brain Stimulation, endoscopic surgery, craniotomy, stereotactic radiosurgery, microsurgery, Endoscopic management, Cordotomy, transphenoidal surgery, and radiation implants.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including MRI Scan of the Brain, MRI Scan of the Spine, CAT Scan of the Brain, CT Scan of the Brain, Magnetic Resonance Imaging (MRI), Computed Axial Tomography (CT or CAT Scan), Myelogram, Spinal Tap, Lumbar Puncture (LP), Electromyography (EMG), Cerebral Angiogram, Electroencephalography, Electronystagmography (ENG), Nerve Conduction Velocity (NCV), Spinal Puncture, Positron Emission Tomography (PET Scan), Myelography, Ocular Pressures, Evoked Potentials Studies, and Myogram.

Doctor density varies by specialty and location. Washington, D.C. has 58 practicing neurosurgeon in Washington.

According to 2005 Census estimates, Washington, D.C. has a population of 550,521. Of this population, 110,240 are under the age of 18 and 66,591 are at or above the age of 65.