Our Psychiatric Medical Staff

George Santos, MD, DFAPA
Chief Medical Officer and Executive Medical Director Houston Behavioral Healthcare Hospital
Dr. Santos graduated from the University of Notre Dame and attended medical school at the University of Texas Medical School at Houston, where he also completed his training in General Psychiatry. He is Board Certified in General Psychiatry by the American Board of Psychiatry and is a Distinguished Fellow of the American Psychiatric Association, and a recipient of the Psychiatric Excellence Award from the Texas Society of Psychiatric Physicians. He has served as a Senior Examiner for the American Board of Psychiatry and Neurology for over 15 years. He is a member of the American College of Psychiatrists and the American College of Physician Executives. In over twenty years of private practice treating psychiatric and chemical dependency disorders, he has always maintained direct patient care as a central core of his work. Dr. Santos has worked for nearly two decades as a hospital Medical Executive and as an active legislative advocate for Healthcare issues. He serves on the Board of Managers of the Harris Health System, appointed by the County Judge and the Harris County Commissioners Court. He also serves on the Executive Boards of the Harris County Medical Society and the Houston Academy of Medicine, where he is President Elect, and serves on the Board of Directors for Medserv, Inc. and the Houston Medical Museum. He is currently the Chief Medical Officer and Executive Medical Director of the Houston Behavioral Healthcare Hospital and is a regional CMO consultant for Signature Healthcare.

John Marcellus, MD
Associate Medical Director and Clinical Medical Director of Outpatient Services
Dr. Marcellus obtained his undergraduate degree from Georgetown University and his medical degree from the University of Mississippi Medical School. Subsequent postgraduate training included a residency in Psychiatry and a Fellowship in Child and Adolescent Psychiatry at Baylor College of Medicine. He is board certified by the American Board of Psychiatry and Neurology in both General Psychiatry and Child and Adolescent Psychiatry. Dr. Marcellus is a member of the American Psychiatric Association, Texas Society of Psychiatric Physicians, American Association of Child and Adolescent Psychiatry, Texas Medical Association, and Harris County Medical Society. He was a recipient of the Eli Lilly Fellowship Program of the U.S. Psychiatric and Mental Health Congress, and has served on the Board of Directors of Mental Health America of Greater Houston. He is an examiner for the American Board of Psychiatry and Neurology. Dr. Marcellus sees patients ages four and older in both office and hospital settings. He is the Associate Medical Director and Clinical Director of Outpatient Services at Houston Behavioral Healthcare Hospital, and also serves as a consultant to the National Aeronautics and Space Administration on astronaut selection and behavioral health policy. Dr. Marcellus has a special interest in the treatment of ADHD and mood disorders.

Heather Sauer, MD
Clinical Medical Director Youth Services
Dr. Sauer is Board certified in Child & Adolescent Psychiatry, as well as General Adult Psychiatry. She grew up in St. Louis, MO and graduated from St. Louis University School of Medicine in 2006 before moving to Texas. Dr. Sauer’s post graduate training included a residency in General Psychiatry and a Fellowship in Child and Adolescent Psychiatry at UTMB in Galveston. Dr. Sauer is a member of the American Medical Association. Dr. Sauer is currently the Clinical Medical Director for Youth Services at Houston Behavioral Healthcare Hospital where she works with children, teens & adults. Her outpatient practice is a part of the Greater Houston Psychiatric Associates (GHPA) group.

Arif Shoaib, MD
Clinical Medical Director of Adult Services
Dr. Shoaib is Board certified in General Adult Psychiatry as well as Child and Adolescent Psychiatry. He graduated from Sind Medical College in Karachi, Pakistan. Dr. Shoaib completed an Internship at Duke University Medical Center and completed his General Psychiatry residency at Baylor College of Medicine and his Child Psychiatry Fellowship at University of Texas, Houston. Dr. Shoaib did extensive research in Psychiatry at the University of Texas Medical School in Houston and produced multiple publications prior to residency. Dr. Shoaib has won several awards including the National Institute of Mental Health Outstanding Resident Award and the American College of Psychiatris’ Laughlin Fellowship Award. Dr. Shoaib has been in fulltime practice since 2003 and is currently the Clinical Director of Adult Services at Houston Behavioral Healthcare Hospital.

VISIT THIS PAGE IN THE FUTURE FOR MORE INFORMATION ABOUT PLANNED ADDITIONS TO OUR MEDICAL STAFF.