Our fellowship is committed to building a diverse and inclusive workforce of fellows, faculty, and administrative staff whose values align with our organization’s.

Program Leadership

Jonathan Arcobello, MD

Jonathan Arcobello, MD

Program Director, LLU

Transplant Infectious Diseases, LLU Medical Center
Dr. Arcobello is the Site Director at LLU for the Infectious Diseases Fellowship and serves on the transplant/immunocompromised clinical service at the LLU Medical Center. He completed his residency and fellowship at Wayne State University.

LLU Faculty

Kristen Carr, MD

Kristen Carr, MD

Division Director of Resident Education and ID Interest Group Mentor, LLU
Dr. Carr completed her residency training at Loma Linda University and fellowship at the Yale New Haven Medical Center. She serves as Director of Resident Education in the Division of Infectious Diseases at LLU, as well as a mentor for the ID Interest Group. Her areas of interest include HIV, syphilis, zoonotic infections, fungal infections, and diagnostic challenges.

Sandy Chang, MD

Sandy Chang, MD

Transplant Infectious Diseases, LLU Medical Center
Dr. Chang serves on the transplant/immunocompromised clinical service at the LLU Medical Center. She completed her internal medicine residency and infectious diseases fellowship at the University of California, Los Angeles. She then served as a clinical instructor while also completing an additional year of training in transplant infectious disease at UCLA prior to coming to LLU Medical Center.

Richelle Guerrero-Wooley, MD

Richelle Guerrero-Wooley, MD

Director of Stewardship, LLU
Dr. Guerrero-Wooley completed her residency at Adventist Health and infectious diseases fellowship at Wake Forest Baptist Health Medical Center. She serves as Director of the Antimicrobial Stewardship Program, Chair of the Antimicrobial Stewardship Committee, and is a member of the Pharmacy and Therapeutic Committee at LLU Medical Center. Her clinical emphasis lies in antimicrobial stewardship, bone and joint infections, and diabetic foot infections.

Eugene Liu, MD

Eugene Liu, MD

Co-Director of Hospital Epidemiology, LLU Medical Center
Dr. Liu completed his internal medicine residency training at the University of Michigan and infectious diseases fellowship at the National Institutes of Health. He was an Epidemic Intelligence Service (EIS) officer at CDC in the Parasitic Disease Branch. He serves as Co-Director of Hospital Epidemiology at LLU. His research interests include understanding the emergence of multi-drug resistant organisms.

Daniel Rogstad, MD, PhD

Daniel Rogstad, MD, PhD

Associate Dean, Basic Science Education, LLU School of Medicine
Director, Coccidioides Clinic, LLU
Dr. Rogstad completed his internal medicine residency and infectious diseases fellowship at the Mayo Clinic, Rochester, Minnesota. He serves as Associate Dean for Basic Science Education at the LLU School of Medicine, as well as the director of the LLU Coccidioides Clinic.

Anna Ursales, MD

Anna Ursales, MD

Director of Global Medicine, LLU
Dr. Ursales finished her residency training at the Kettering Medical Center and fellowship at Baylor University Medical Center. She serves as the Director of Global Medicine at LLU with a clinical and academic focus in global health.

Jennifer Veltman, MD

Jennifer Veltman, MD

Chief, Division of Infectious Diseases, LLU
Dr. Veltman heads the Infectious Diseases Division at LLU as Division Chief. In addition to her executive duties she currently leads multiple clinical trials in COVID-19 and HIV care. She completed her residency training at Wayne State University and fellowship at the University of California, Los Angeles.

VA Faculty

Lynette Chen, MD, MPH

Lynette Chen, MD, MPH

Loma Linda Veterans Hospital (LLVA)
Dr. Chen completed her residency training at the LLU School of Medicine in the HIV Pathway Tract and fellowship at Thomas Jefferson University. Her professional duties include managing the COVID-19 response at the LLVA.

Raul Nakamatsu, MD

Raul Nakamatsu, MD

Director, HIV Clinic, Loma Linda Veterans Hospital
Dr. Nakamatsu serves as the director of the HIV clinic at the Jerry L. Pettis Memorial Hospital. He completed his residency and fellowship at the University of Louisville.

Brian Wong, MD

Brian Wong, MD

Loma Linda Veterans Hospital (LLVA)
Director, Internal Medicine Residency HIV Pathway, LLU School of Medicine
Dr. Wong serves as director for the HIV Pathway in the Internal Medicine Residency program which trains residents in the acute and longitudinal care of persons living with HIV infection. He completed his residency and fellowship at the LAC+USC Keck School of Medicine.

Michael Ing, MD, FACP, DTM&H

Michael Ing, MD, FACP, DTM&H

Site Director

Chief, Infectious Diseases Section, Loma Linda Veterans Hospital (LLVA)
Dr. Ing heads the Infectious Diseases Section at the Jerry L. Pettis Memorial Veterans Hospital. He completed his residency training at the LLU School of Medicine and served as chief resident at the Riverside General Hospital University Medical Center. He completed his fellowship at UCLA Harbor, and DTM&H training at the London School of Hygiene and Tropical Medicine. Dr. Ing’s renowned professional career includes decades of experience in leading academic medicine in the Inland Empire. His leadership duties also include Chair of the Infection Control Committee at the LLVA, as well as serving on the Pharmacy and Therapeutics, Antibiotic Stewardship, Water Safety, and Clinical Practice committees.

PROGRAM COORDINATOR

Michael Ervin

Michael Ervin

Fellowship Program Coordinator II

Hello, my name is Michael Ervin, I started working for Loma Linda University Health in 2020 in Human Resources as an onboarding specialist and began my role as an Internal Medicine Fellowship Coordinator in 2024. I enjoy being a part of a strong team whose goal is to help all Fellows and support them during this time in their life. I look forward to helping each of you now and in the future.