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Our Doctors

Our Barlow Respiratory Hospital doctors provide expert on-site care 24 hours a day, seven days a week.

Our pulmonologist-led multidisciplinary medical team is dedicated to the care of chronically and critically ill patients with complex medical needs and respiratory conditions.

Medical Executive Committee:

  • David R. Nelson, MD, Pulmonary Medicine/Internal Medicine
  • Azmy Ghaly, M.D., Internal Medicine
  • Moez Khorsandi, D.O., Urology
  • Tony (Ngoc) T. Nguyen, M.D., Cardiology

Members-at-Large Barlow Respiratory Hospital Los Angeles:

  • Francoise Kramer, M.D., Infectious Diseases
  • Jon P. Kea, M.D., Internal Medicine

Member-at-Large Barlow Respiratory Hospital at PIH Health Hospital Whittier:

  • Nadeem A.Chishti, M.D., Pulmonary Medicine/Int Med

Member-at-Large Barlow Respiratory Hospital at Valley Presbyterian Hospital Van Nuys:

  • Sanjay V. Vadgama, M.D., Pulmonary Medicine/Int Med

Medical Director

Dr. David R. Nelson has served on Barlow Respiratory Hospital’s medical staff since 1991.
A board-certified pulmonologist, he provides clinical management and oversight for all professional and administrative activities within Barlow Respiratory Hospital. Dr. Nelson practices full-time at Barlow’s Main Campus in Los Angeles and also oversees Barlow’s satellite facilities at PIH Health Hospital in Whittier and Valley Presbyterian Hospital in Van Nuys.

Before joining the medical staff at Barlow Respiratory Hospital, Dr. Nelson completed his undergraduate studies at the University of California, Berkeley and earned his medical degree at Loyola University of Chicago Stritch School of Medicine. He completed his internship and residency in Internal Medicine at USC – Keck School of Medicine, Los Angeles. He then went on to complete his Fellowship in Critical Care Medicine and Pulmonary Disease at USC – Keck School of Medicine, Los Angeles. Dr. Nelson is also Associate Professor of Clinical Medicine David Geffen School of Medicine at UCLA, Los Angeles, California.


Barlow Respiratory Hospital’s core group of doctors serve as attending physicians during a patient’s hospitalization at Barlow. Specialists at each of our locations provide for individual patient needs.

Specialists Serving Barlow Respiratory Hospital

Medical Staff at all Barlow Locations (Los Angeles, Van Nuys, Whittier)