Welcome New DoM Faculty

Richard Cheng, MD
Practice Location:
Westwood & Encino

Doctor of Medicine:
Geisel School of Medicine at Dartmouth, 2011

Residency:
Internal Medicine, Cedars Sinai, 2014

Fellowship:
Advanced Heart Failure and Transplant Cardiology, Cedars Sinai, 2019

Interventional Cardiology, Cedars Sinai, 2018

Cardiovascular Disease, Cedars Sinai, 2017

Daniel P. O'Brien, MD
Practice Location:
Palos Verdes

Doctor of Medicine:
Keck School of Medicine of the USC, 2018

Residency:
Internal Medicine, UCLA School of Medicine, 2021

Fellowship:
Cardiovascular Disease, UCLA Cardiology Fellowship, 2025

Andrea J. Borba, MD
Practice Location:
Redondo Beach

Doctor of Medicine:
Geisinger Commonwealth School of Medicine, 2020

Residency:
Dermatology, Geisinger Medical Center, 2024

Fellowship:
Micrographic Surgery and Dermatologic Oncology, Geisinger Medical Center, 2025

Jonathan Alan Cotliar, MD
Practice Location:
Westwood & Torrance

Doctor of Medicine:
University of Kentucky College of Medicine, 1999

Residency:
Internal Medicine, UCLA School of Medicine, 2003

Dermatology, UCLA School of Medicine, 2004

Fellowship:
Translational, Investigation, UCLA Training Program in Translational Science, 2005

Andrew Gregg, MD, PhD
Practice Location:
Thousand Oaks

Doctor of Medicine:
MD, Weill Cornell Medical College, 2019

PhD, Rockefeller University, 2018

Residency:
Internal Medicine, UCLA David Geffen School of Medicine, 2022

Fellowship:
Gastroenterology, UCLA Gastrointestinal Fellowship Training Program, 2025

Dorian B. Mendoza, MD
Practice Location:
Beverly Hills

Doctor of Medicine:
University of Texas Southwestern Medical Center, 2019

Residency:
Internal Medicine, Icahn School of Medicine at Mount Sinai, 2022

Fellowship:
Gastroenterology, UCLA David Geffen School of Medicine, 2025

Jason J. Pan, MD
Practice Location:
Westwood

Doctor of Medicine:
Icahn School of Medicine at Mount Sinai, 2014

Residency:
Internal Medicine, Scripps Clinic/Scripps Green Hospital, 2017

Chief Residency, Scripps Clinic/Scripps Green Hospital, 2018

Fellowship:
Gastroenterology, Brown University/Rhode Island Hospital, 2021

Transplant Hepatology, University of Michigan, 2022

Robert J. Tamai, MD
Practice Location:
San Fernando Valley

Doctor of Medicine:
Johns Hopkins University School of Medicine, 2018

Residency:
Internal Medicine, LAC + USC Medical Center, 2021

Fellowship:
Gastroenterology, UCLA Vatche & Tamar Manoukian, 2025

Amanda C. Leiter, MD
Practice Location:
Santa Monica

Doctor of Medicine:
Icahn School of Medicine at Mount Sinai, 2015

Residency:
Internal Medicine, Icahn School of Medicine at Mount Sinai, 2018

Fellowship:
Endocrinology, Diabetes & Metabolism, Icahn School of Medicine at Mount Sinai, 2020

T32 Cancer Training and Control in Priority Populations, Icahn School of Medicine at Mount Sinai, 2022

Allison T. Yip, MD
Practice Location:
Burbank

Doctor of Medicine:
Case Western Reserve Univ School of Medicine, 2020

Residency:
Internal Medicine, UC San Diego, 2023

Fellowship:
Endocrinology, Diabetes and Metabolism, UCLA David Geffen School of Medicine, 2025

Omar Amir, MD, MS
Practice Location:
Westwood

Doctor of Medicine:
Stanford University School of Medicine, 2012

Residency:
Brigham and Women's Hospital Program, 2016

Fellowship:
Geriatric Medicine, Beth Israel Deaconess Medical Center Gerontology Fellowship, 2017

Gerontology, Advanced Geriatric Fellowship, 2018

Tomonao Hashimoto, MD
Practice Location:
Westwoos & Santa Monica

Doctor of Medicine:
Tokai University School of Medicine, 2012

Residency:
Family Medicine, Case Western Reserve University/University Hospitals Cleveland Medical Center, 2021

Fellowship:
Geriatric Medicine, University of California, Los Angeles, 2022

Shyam S. Kolangara, MD
Practice Location:
Simi Valley

Doctor of Medicine:
Kasturba Medical College Manipal, 2011

Residency:
Internal Medicine, Sinai Hospital of Baltimore, 2018

Fellowship:
Geriatric Medicine, University of Maryland Medical Center, 2020

Abdullah M. Firoze Ahmed, MD
Practice Location:
Santa Monica

Doctor of Medicine:
Weill Cornell Medical College in Qatar, 2013

Residency:
Internal Medicine, Rochester General Hospital, 2016

Nathan L. McLaughlin, MD
Practice Location:
Santa Monica

Doctor of Medicine:
University of Washington School of Medicine, 2022

Residency:
Internal Medicine, UCLA Department of Internal Medicine, 2025

Gyuhee Seong, MD
Practice Location:
Santa Monica

Doctor of Medicine:
Kyung Hee University, 2020

Residency:
Internal Medicine, SUNY Downstate Medical Center, 2024

Sabrin Kaur Sidhu, MD
Practice Location:
Santa Monica

Doctor of Medicine:
USC Keck School of Medicine, 2022

Residency:
Internal Medicine, Olive View Medical Center - UCLA, 2025

Enrique Camacho Jr., DO, MBA
Practice Location:
San Luis Obispo

Doctor of Osteopathy:
Western University of Health Sciences, 2011

Residency:
Family Medicine, KCU-GMEC/Unity Health-White County Medical Center, 2018

Harleen Multani, MD
Practice Location:
Santa Barbara

Doctor of Medicine:
University of Mississippi Medical Center, 2021

Residency:
Internal Medicine, West Suburban Medical Center, 2025

Bernadette Miramontes, MD, MPH

Doctor of Medicine:
University of Miami Miller School of Medicine, 2022

Residency:
Internal Medicine, West Anaheim Medical Center, 2025

Internal Medicine, University of Texas Southwestern Medical Center, 2024

Jose Angel Negrete Manriquez, MD, MPP

Doctor of Medicine:
UCLA David Geffen School of Medicine, 2022

Residency:
Internal Medicine, University of California Davis Medical Center, 2025

Nikeshan Jeyakumar, MD, MPH, MHS
Practice Location:
Santa Monica

Doctor of Medicine:
University of Miami, Miller School of Medicine, 2018

Residency:
Internal Medicine, Baylor College of Medicine, 2021

Fellowship:
Hematology/Oncology, Stanford School of Medicine, 2024

Blood and Marrow Transplantation and Cellular Therapy, Stanford School of Medicine, 2025

Alexis Ann LeVee, MD
Practice Location:
Santa Monica

Doctor of Medicine:
Tufts Medical Center/Tufts University School of Medicine, 2019

Residency:
Internal Medicine, Cedars Sinai, 2022

Fellowship:
Hematology and Medical Oncology, City of Hope National Medical Center, 2025

Wilson D. Ricketts, MD
Practice Location:
Westwood

Doctor of Medicine:
University of Alabama School of Medicine, 2020

Residency:
Internal Medicine & Pediatrics, UCLA David Geffen School of Medicine/UCLA Medical Center, 2024

Fellowship:
Hospice & Palliative Medicine, UCLA David Geffen School of Medicine/UCLA Medical Center, 2025

Josephine C. Hwang, MD, MPH
Practice Location:
Pasadena & Burbank

Doctor of Medicine:
Thomas Jefferson University, 2019

Residency:
Internal Medicine, Cedars Sinai Medical Center, 2022

Fellowship:
Pulmonary and Critical Care Medicine, Cedar Sinai Medical Center-GME, 2025

Andy T. Nguyen, MD
Practice Location:
West LA

Doctor of Medicine:
Saint Louis University School of Medicine, 2020

Residency:
Internal Medicine, Montefiore Medical Center/ Albert Einstein College of Medicine, 2023

Fellowship:
Rheumatology, Columbia Presbyterian Medical Center, 2025

Amy Trang, MD
Practice Location:
Burbank & Pasadena

Doctor of Medicine:
Oakland University William Beaumont School of Medicine, 2020

Residency:
Internal Medicine, Rush University Medical Center, 2023

Fellowship:
Rheumatology, UCLA Medical Center, 2025