Meet Our Team of Board-Certified Cardiothoracic Surgeons
Physician Assistants

Junaid H. Khan, M.D.


Dr. Khan is a graduate of the University of California, Los Angeles School of Medicine. He completed his residency in general surgery, cardiac surgery, and thoracic surgery at the University of California in San Francisco. Dr. Khan worked for two years in the research lab at UCSF. He specializes in adult cardiac surgery and thoracic surgery, including coronary artery bypass grafting and minimally invasive valve surgery. He has a particular interest in endoscopic mitral valve repair.

Dr. Khan’s CV

Russell D. Stanten, M.D.


Dr. Stanten attended Baylor College of Medicine in Houston, Texas. His internship and residency were completed at the University of California, Davis Medical Center. His fellowship in cardiothoracic surgery was served at Brigham & Women’s Hospital, Boston Massachusetts. Dr. Stanten specializes in adult cardiac and thoracic surgery, including coronary artery bypass grafting, heart valve replacement, heart valve repair, lung cancer, esophageal surgery, and minimally invasive valve surgery.

Dr. Stanten’s CV

Barry Sheppard, M.D.

Thoracic Surgeon

Dr. Sheppard received his medical degree from the University of South Carolina School of Medicine. He completed his residency in general surgery at Harbor-University of California, Los Angeles Medical Center, and served his thoracic surgery residency at the University of California Davis Medical Center. He is board-certified and a diplomate of the American Board of Thoracic Surgery. Dr. Sheppard has a particular interest in screening for lung cancer. He has been a Principal Investigator with the International Early Lung Cancer Action Program since 2002, an international consortium of hospitals that has pioneered the use of low-dose CT scans to detect early-stage lung cancer.

Physician Assistants

Our Physician Assistants (PAs) work collaboratively with the surgeons to provide excellent patient care. PAs assist during surgery and also provide care both before and after surgery. All the PAs at East Bay Cardiac Surgery are nationally and board-certified.

Lauren Hewett, MS, PA-C

Physician Assistant

Lauren is a nationally certified Physician Assistant specializing in Cardiothoracic surgery. She completed her Honors Bachelor of Science in Kinesiology from the University of Delaware. She subsequently earned her Masters in Physician Assistant studies from Arcadia University in Pennsylvania. Lauren assists in both cardiac and thoracic surgeries, as well as collaboratively manages the care and treatment for pre- and post-operative patients.

Bianca Hebert, PA-C

Physician Assistant

Bianca earned her Bachelor of Science in Biology from Northeastern University and her Master of Science from Western University of Health Sciences in Physician Assistant Studies. Bianca enjoys working with our diverse patient population and finds fulfillment in seeing their progression as they recover from surgery.

Jennifer Yu, PA-C

Physician Assistant

Jennifer grew up in the Bay Area and completed her Bachelor of Science in Molecular, Cell, and Developmental Biology at the University of California, Santa Cruz. She then earned her Physician Assistant Masters degree from The George Washington University. She enjoys working with a diverse patient population and is fluent in Cantonese.

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