Dr. Marshall's areas of expertise include transient ischemic attack (TIA), carotid ultrasound, and carotid artery disease. He takes Aetna EPO, POMCO, and Blue Cross/Blue Shield, as well as other insurance carriers. Before completing his residency at New York-Presbyterian Hospital and Columbia University Medical Center, Dr. Marshall attended medical school at the University of California, San Francisco (UCSF), School of Medicine. Distinctions awarded to Dr. Marshall include: One of America's Top Doctors; Rated one of New York Magazine's Best Doctors; and C Miller Fisher lectureship, MGH, Boston. He is conversant in Spanish. Dr. Marshall is professionally affiliated with ColumbiaDoctors. Dr. Marshall has an open panel.