Faculty

All WMMC residencies are responsible to Leroy Reese, M.D., Associate Dean for the White Memorial Medical Center campus of the Loma Linda University School of Medicine.

All Family Medicine faculty teach in the Family Health Center and attend on the Family Medicine Service.

Full-time Faculty

Lucila Tarin, M.D.

Lucila Tarin, M.D., Faculty, Program Director

Birthplace: Los Angeles, CA

Medical School: Medical College of Wisconsin

Residency: USC/California Hospital Medical Center

Certification: American Board of Family Medicine, 2003; Recertified, 2013

Responsibilities: Faculty and Preceptor for the Family Health Center. Coordinates and teaches research curriculum and supervises resident scholarly projects.


Hector Flores, M.D.

Hector Flores, M.D., Co-Director
Birthplace: Veracruz, Mexico
Medical School: University of California, Davis
Residency: Kaiser Permanente Medical Center, Los Angeles
Certification: American Board of Family Medicine, 1985; Recertification, 2007
Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine
Responsibilities: Designs, coordinates, teaches and administers special teaching elements in quality improvement, utilization management, risk management, practice management, research, and fellowship activities.


Mauricio Bueno, M.D.

Mauricio Bueno, M.D., Director, Inpatient Service

Birthplace: Los Angeles, CA

Medical School: University of Southern California

Residency: USC/Presbyterian Intercommunity Hospital

Certification: American Board of Family Medicine, 1986; Recertification, 2007

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Coordinates and evaluates inpatient training, including ascertaining that the experiences of family medicine residents on other specialty inpatient services are appropriate for family physicians.


Edward Castro, M.D.

Edward Castro, M.D., Director, Ambulatory Care

Birthplace: Los Angeles, CA

Medical School: University of California, San Diego

Residency: Cook County Hospital

Certification: American Board of Family Medicine, 1986; Recertification, 2006

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Directs the ambulatory care training for residents in the Family Health Center and outpatient quality improvement activities.


Andrew Chan, M.D.

Andrew Chan, M.D., Director, Geriatric Service

Birthplace: Los Angeles, CA

Medical School: Medical College of Wisconsin

Residency: White Memorial Medical Center, Los Angeles

Fellowship: Geriatric Medicine, UCLA

Certification: American Board of Internal Medicine, 1988; Geriatric Medicine, 2010​

Faculty: Assistant Clinical Professor, USC School of Medicine, Keck School of Medicine.

Responsibilities: Coordinates, teaches and evaluates the geriatric rotation and longitudinal curriculum including Geriatric Assessment Unit, Nursing home, and home visits.


Daniel Maldonado, M.D.

Daniel Maldonado, M.D., Faculty, Family Medicine Service

Birthplace: Torrance, CA

Medical School: University of California, Los Angeles

Residency: White Memorial Medical Center

Certification: American Board of Family Medicine, 2001; Recertification, 2009

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Faculty for the Inpatient Family Medicine Service.


Jorge Martinez, M.D.

Jorge Martinez, M.D., Faculty, Outpatient Medicine

Birthplace: San Luis Potosi, Mexico

Medical School: University of California, Los Angeles

Residency: Harbor-UCLA Medical Center

Certification: American Board of Family Medicine, 2003; Recertification 2010

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Faculty for the Inpatient Family Medicine Service; Faculty Preceptor for the Family Medicine Procedure Clinic.


Gilbert Medina, M.D.

Gilbert Medina, M.D., Faculty, Outpatient Medicine

Birthplace: Los Angeles, CA

Medical School: New York University

Residency: White Memorial Medical Center

Certification: American Board of Family Medicine, 2010

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Teaches residents and medical students in the outpatient clinic, specifically in areas of process improvement and quality improvement. Project Lead for Patient Centered Medical Home (PCMH).


pacheno.pngArmando Pacheco, M.D.

Armando Pacheco, M.D., Faculty, Family Medicine Service

Birthplace: Los Angeles, CA

Medical School: University of California, San Diego

Residency: White Memorial Medical Center

Certification: American Board of Family Medicine, 1995; Recertification, 2009

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Faculty for the Inpatient Family Medicine Service. Coordinates and evaluates sports medicine rotations and serves as a team physician for a local football team.


samaniego.pngLuis Samaniego, M.D.

Luis Samaniego, M.D., Outpatient Medicine

Birthplace: Los Angeles, CA

Medical School: University of Southern California

Residency: Kaiser Permanente Medical Center, Los Angeles

Certification: American Board of Family Medicine, 1984; Recertification, 2013

Faculty: Assistant Clinical Professor, USC School of Medicine, Department of Family Medicine

Responsibilities: Responsible for the overall design and administration of the residency program, as well as teaching in hospital clinical and conference settings.


 Geny Zapata, Psy.D.

Geny Zapata, Psy.D.

Geny Zapata, Psy.D. is a health psychologist who serves as Director of Behavioral Sciences at White

Memorial Medical Center Family Medicine Residency Program. Dr. Zapata earned her Doctorate in

Clinical-Community Psychology from the University of La Verne and is a licensed psychologist in

California. Dr. Zapata completed a two-year American Psychological Association (APA) accredited

fellowship in Behavioral Medicine and In-patient Psychiatry at Harbor-UCLA Medical Center and an APA accredited internship at Children’s Institute Incorporated. Dr. Zapata is a CAPIC/MHSA grant recipient for her work with underserved populations. Additionally, she serves as a member of the Institutional Review Board (IRB) committee at the Reiss-Davis Graduate Center for Child Development and Psychotherapy. She has worked in hospital and clinical community settings providing culturally and linguistically appropriate mental health services to populations of diverse backgrounds. Dr. Zapata has also provided clinical supervision, consultation, education to doctoral and master level medical and mental health providers.


villegas.pngSergio Villegas, M.D.

Sergio Villegas, M.D., Faculty, Outpatient Medicine

Birthplace: San Gabriel, CA

Medical School: University of California, Davis

Residency: White Memorial Medical Center

Certification: American Board of Family Medicine, 1991; Recertification, 2013


Additional Support

Ramesh Manchanda, M.D.

Specialty: Internal Medicine, Nephrology

Responsibilities: Faculty for Family Medicine Service

Roybal Mental Health Facility

A large faculty of behaviorists are drawn upon to teach family medicine residents in areas which range from substance abuse and adolescent medicine to family counseling and independent living for the aged and for those with chronic mental illness.

Institutional Faculty

All coordinators provide consultants from their respective specialties and appropriate subspecialties to provide round-the-clock back-up for the Family Medicine Service, as well as consultants for specialty clinics, didactic conferences, and special workshops and other learning experiences.

Coordinator of Adult Medicine Training

Juan Barrio, M.D., Director of Internal Medicine Residency Program, coordinating with the Family Medicine Director of Inpatient Training, ensures rigorous medical subspecialty educational experience with case selection appropriate for family medicine training. This intensive experience largely occurs on the teaching floors, the special units, and consultation services, augmented by appropriate clinics and didactic presentations, many of which coordinate with the Family Medicine curriculum.

Coordinator of Emergency Medicine Training

John Plosay, M.D., Chief of Emergency Services, coordinates the emergency room training of Family Medicine residents.

Coordinator of General Surgical Training

Faisal Khan, M.D., Department of Surgery, coordinates all aspects of surgical training for family medicine residents with the Family Medicine Director of Inpatient Training. This includes ambulatory and office surgery, the hospital and operating room experience, didactic instruction, and developing the full role of the family physician in the surgical process, including the primary care physician-consultant relationship.

Coordinator of Obstetrics Training

Cinna Wohlmuth, M.D., Director of Obstetrics and Gynecology Residency Program, in conjunction with the Family Medicine Director of Woman's Health, assures that the goals and objectives of the Family Medicine Residency curriculum in OB/GYN are fully met. Instruction is provided by both obstetricians and family physicians. This busy service quickly provides the basic skills that family medicine residents require to care for obstetrical patients in the Family Health Center. Specialty consultation in OB/GYN is available, in-house, 24 hours a day.

Coordinator of Pediatric Training

Ernie Guzman, M.D., Pediatric Department, coordinates with family medicine faculty in providing and evaluating an intensive training program in pediatrics appropriate for Family Medicine residents. A large segment of this program is outpatient-based. Inpatient experiences are supervised by Loma Linda Hospitalists and senior house officers.