Meet Our Executive Leadership Team

John A. Belperio, MD

John A. Belperio, MD

Interim Division Chief
David Sayah, MD, PhD

David Sayah, MD, PhD

Clinical Chief | Medical Director Lung Transplant Program

Our Leadership Team

Ravi S. Aysola, MD

Ravi S. Aysola, MD

Section Chief, Sleep Medicine
Igor Barjaktarevic, MD, PhD

Igor Barjaktarevic, MD, PhD

Medical Director, COPD Program | Medical Director, Liver Transplant ICU
Steven Y. Chang, MD, PhD

Steven Y. Chang, MD, PhD

Medical Co-Director, Ronald Reagan Medical Center Medical Intensive Care Unit
Colleen L. Channick, MD

Colleen L. Channick, MD

Co-Director, Interventional Pulmonary Program
Richard N. Channick, MD

Richard N. Channick, MD

Co-Director, Pulmonary Vascular Disease Program | Medical Director, Acute and Chronic Thromboembolic Disease Program
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Patricia H. Eshaghian, MD

Medical Director, Adult Cystic Fibrosis Program
Oscar A. Estrada Paz, MD

Oscar A. Estrada Paz, MD

Medical Director, Santa Monica Hospital Medical Intensive Care Unit
Tao He, MD, PhD

Tao He, MD, PhD

Medical Director, San Fernando Valley Interventional Pulmonology
Rita Kachru, MD

Rita Kachru, MD

Section Chief, Clinical Immunology & Allergy
Kathryn H. Melamed, MD

Kathryn H. Melamed, MD

Program Director, Pulmonary & Critical Medicine Fellowship
Nida Qadir, MD

Nida Qadir, MD

Medical Co-Director, Ronald Reagan Medical Center Medical Intensive Care Unit
Allison L. Ramsey, MD

Allison L. Ramsey, MD

Program Director, Lung Transplant Fellowship
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Rajan Saggar, MD

Co-Director, Pulmonary Vascular Disease | Program Director, Pulmonary Hypertension Program
S. Samuel Weigt, MD

S. Samuel Weigt, MD

Medical Director, Interstitial Lung Disease Center
Michelle R. Zeidler, MD

Michelle R. Zeidler, MD

Program Director, Sleep Medicine Fellowship