Board of Directors

    Margarita Loeza, M.D.

    Dr. Margarita Loeza graduated from the University of California, San Diego School of Medicine in 1997 then completed a Family Medicine Residency at Arrowhead Regional Medical Center.  In 2001, Dr. Loeza started volunteering at Venice Family Clinic returning to the free clinic where she and her family had received medical care as a child. Read full bio.

        Tina Nevares, M.D.

        Faustina Nevarez, was born in Mexico in 1952.  The eldest of a family of 6, her parents immigrated to Northern California to a small farming town where she attended public schools. The daughter of farmworkers, summers were often spent harvesting tomatoes, plums and working the fields. She completed her undergraduate degree at the University of California at Davis in 1975.   Read full bio.

            Connie Casillas, M.D.

            Dr. Consuelo Casillas is a family physician and co-chair for Culturally Responsive Care and Pasadena’s Patient-Centered Medical Home at Kaiser’s Los Angeles Medical Center. Dr. Casillas enjoys providing care for a vibrant, diverse patient population at Kaiser Los Angeles Medical Center’s Pasadena Medical Office Building where she serves as a module clinic lead and cervical cancer screening physician champion. Read more here. Read full bio.

                Waldo Concepcion, M.D.

                Waldo Concepcion, MD, FACS, is a Professor of Surgery, Chief of Clinical Transplantation at Stanford University and Chief of Pediatric Kidney Transplantation at Lucille Packard Children’s Hospital at Stanford. Dr. Concepcion was born in Omaha, Nebraska and spent his early years in Panama and Costa Rica.  He graduated Medical School from Universidad Autonoma de Guadalajara, Mexico. He then completed his General Surgery Residence at Loma Linda University Medical Center and his Transplantation Surgery Fellowship at University of Pittsburgh under the mentorship of Dr. Thomas Starzl, world leader in the field of transplantation. Read more here.

                    José Arévalo, M.D., FAAFP, LPOC Chair*

                    Dr. Arévalo is Senior Medical Director for Sutter Independent Physicians, a 600-physician multispecialty IPA in Greater Sacramento. He is a board-certified family physician with a long and prominent reputation as a teacher, researcher and administrator. A graduate of Stanford Medical School, he completed his residency and clinical research fellowship at UCSF.  Read full bio.

                        Sergio Aguilar-Gaxiola, M.D., Ph.D., LPOC Vice Chair*

                        Dr. Aguilar-Gaxiola is an internationally renowned expert on mental health in ethnic populations. As on-site principal investigator of the Mexican American Prevalence and Services Survey–the largest U.S. mental health study on Mexican Americans–he identified the most prevalent mental health disorders in the Mexican population in California’s central valley. Read full bio.

                            Silvia Diego, M.D., LPOC Treasurer*

                            Dr. Diego is the Chief Medical Officer at Golden Valley Health Centers in California’s Central Valley. She was appointed to the Medical Board of California by Arnold Schwarzenegger in 2010 and reappointed by Governor Edmund G. Brown, Jr., in 2011. She serves as assistant clinical professor at the UC Davis Department of Family and Community Medicine. Read full bio.

                                Richard S. Baker, M.D., LPOC Secretary*

                                Dr. Baker is Executive Director of the Center for Health Services Research and Chairman of the Department of Ophthalmology at Charles Drew University of Medicine and Science and President of the Charles Drew University Multi- Specialty Practice Group. He holds a joint faculty appointment at UCLA David Geffen School of Medicine. Read full bio.

                                    Thomas S. Nesbitt, M.D., M.P.H.

                                    Dr. Nesbitt is the Associate Vice Chancellor for Strategic Technologies and Alliances and is responsible for advancing the UC Davis Health System’s excellence in clinical outreach and technology-enabled models of care. He works closely with leaders throughout the state in developing partnerships with regional hospitals, clinics and centers. Read full bio.

                                        Lia Margolis, CEO*

                                        Lia Margolis is the Chief Executive Officer of LPOC and President/CEO of Lia Margolis & Associates (LM&A). LM&A works with government, corporate, non-profit, and community-based organizations, specializing in healthcare management, communities of color, consensus building, and conflict resolution. Margolis is a native of East Los Angeles. Read full bio.

                                            John R. Valencia, Legal Counsel*

                                            John Valencia is a partner with Wilke, Fleury, Hoffelt, Gould & Birney, LLP in Sacramento, Calif., and serves as LPOC’s legal counsel. He heads the firm’s Legislative Advocacy and Government Relations group. He spent 10 years in  campaign management, public relations, and health care policy consulting to the California State Assembly. Read full bio.

                                              * LPOC Executive Committee Members