Meet Us

Gastroenterology

Andrew C. Chang, MD

Division Chief

Medical School: Loma Linda University School of Medicine
Residency: Loma Linda University Health, Internal Medicine
Fellowship: Loma Linda University Health, Gastroenterology

Kendrick Che, DO

Medical School: Western University of Health Sciences College of Osteopathic Medicine of the Pacific
Residency: Loma Linda University Health, Internal Medicine
Fellowship: Loma Linda University Health, Gastroenterology

Paul Leonor, MD

Program Director

Medical School: SUNY Downstate Medical Center College of Medicine
Residency: LAC + USC Medical Center, Internal Medicine
Fellowship: LAC + USC Medical Center, Gastroenterology
Fellowship: University of Colorado Anschutz Medical Campus, Advanced Endoscopy

Douglas Nguyen, MD

Medical School: University of Cincinnati College of Medicine
Residency: Mayo Clinic School of Graduate Medical Education, Internal Medicine
Fellowship: University of California Irvine, Gastroenterology

Nour Parsa, MD

Medical School: University of Arizona College of Medicine
Residency: University of Arizona College of Medicine, Internal Medicine
Fellowship: Albany Medical Center, Gastroenterology

Nikhil Thiruvengadam, MD

Medical School: Stanford School of Medicine
Residency: University of Pennsylvania Health System
Fellowship: University of California, San Francisco, Gastroenterology
Fellowship: University of Pennsylvania Health System, Advanced Endoscopy

Timothy Yen, MD

Associate Program Director

Medical School: NYU Grossman School of Medicine
Residency: Stanford University Medical Center, Internal Medicine
Fellowship: University of Colorado Anschutz Medical Campus, Gastroenterology & Hepatology

Lydia Zheng, DO

Medical School: College of Osteopathic Medicine of The Pacific at Pomona
Residency: Loma Linda University Health, Internal Medicine
Fellowship: Loma Linda University Health, Gastroenterology

Gastroenterology & Hepatology

Mina Rakoski, MD

Medical Director Of Hepatology and Liver Transplant
Transplant Hepatology Program Director

Medical School: Sidney Kimmel Medical College at Thomas Jefferson University
Residency: Cedars-Sinai Medical Center, Internal Medicine
Fellowship: Michigan Medicine, Transplant Hepatology
Fellowship: University of Michigan, Gastroenterology

Prachi Rana, MD

Medical School: Rosalind Franklin University of Medicine and Science
Residency: LAC + USC Medical Center, Internal Medicine
Fellowship: Loma Linda University Health, Gastroenterology
Fellowship: University of California Los Angeles, Transplant Hepatology

Lorenzo Rossaro, MD

Medical School: Facolta Di Medicina E Chirurgia
Residency: Facolta Di Medicina E Chirurgia, Internal Medicine
Fellowship: University of Pittsburgh, Gastroenterology

Khaled Selim, MD

Associate Program Director, Transplant Hepatology

Medical School: Cairo University Faculty of Medicine
Residency: St. Joseph's Regional Medical Center, Internal Medicine
Fellowship: University of Southern California, Gastroenterology/Hepatology

VA Faculty

Cindy Cai, MD

Medical School: Sun Yat-sun University of Medical Sciences
Residency: Saint Louis University, Internal Medicine
Fellowship: University of Pittsburgh, Gastroenterology

Daniel Chao, MD

Program Site Director-LLVA

Medical School: University of Massachusetts
Residency: University of Massachusetts, Internal Medicine
Fellowship: University of California, Irvine, Gastroenterology

Erick Imbertson, MD

Medical School: St. George’s University
Residency: Santa Barbara Cottage Hospital, Internal Medicine
Fellowship: Loma Linda University, Gastroenterology

Muhammad Hammami, MD

Medical School: University of Damascus
Residency: Saint Louis University, Internal Medicine
Fellowship: Saint Louis University, Gastroenterology
Fellowship: University of California San Francisco, Inflammatory Bowel Disease

Richard Strong, MD

Medical School: University of California, Irvine
Residency: Naval Hospital San Diego, Internal Medicine
Fellowship: Naval Hospital San Diego, Gastroenterology

Nicole Shah-Gassemzadeh, DO