Katherine Berry, MD - AHN Neurosurgery

Dr. Guthrie cares for patients 17 and older, treating a wide range of illnesses, minor injuries, and chronic conditions. She has a particular interest in womens health and preventive care. She earned her medical degree at the Philadelphia College of Osteopathic Medicine in Philadelphia, Pennsylvania, and completed her residency at St. Francis Hospital in Pittsburgh, Pennsylvania.

Walter E. McGregor, MD is an accomplished cardiac surgeon who offers expertise in mitral valve disease, robotic heart surgery, transcatheter mitral repair, and complex surgical reconstructive techniques.As the Director of Allegheny Health Network's Cardiac Surgery Division, he has developed a multidisciplinary mitral disease program offering unique treatments to patients in Western Pennsylvania that incorporate robotic and catheter based technologies for enhanced recovery and improved outcomes. He is known as a clinical leader in this field and is designated as a mitral reference center surgeon by the American Heart Association. He also serves as a key investigator on several clinical trials assessing novel percutaneous mitral and tricuspid valve treatments.Recognized for his commitment to resident development, he serves as Director for the Thoracic Surgery Residency Program, maintains Associate Professorship at Drexel University College of Medicine, and is previously a funded investigator for the NIH. He is known to be a true role model and mentor for the residents and maintains an environment of scholarly commitment for his trainees. Dr. McGregor received his medical degree from an accelerated 6 year BS/MD program at the Northeastern Ohio Universities College of Medicine, and is an active member of the Society of Thoracic Surgeons, International Society for Minimally Invasive Cardiothoracic Surgery, and Mensa International.

Dr. Leonardo is board-certified in neurosurgery and fellowship-trained in intraventricular and skull base neuroendoscopy. She specializes in the diagnosis and surgical treatment of disorders of the central and peripheral nervous system including hydrocephalus, intraventricular tumors, pituitary and skull base tumors, brain tumors, trauma, infections of the brain and spine, stroke, and other diseases of the spine. She has particular interest in minimally invasive endoscopic brain and pituitary surgical techniques as well as the surgical management of adult hydrocephalus.