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Executives

Luisa Buada, RN, MPH

Chief Executive Officer

Luisa Buada has over 36 years experience in health care administration, management and organizational development. She was the founding Executive Director of both Clinicas de Salud in the Salinas Valley and of Berkeley Primary Care Access Clinic. She cofounded LifeLong Medical Care in Berkeley as part of a merger with Over 60 Health Center in 1996. She participated as a consultant in the development of Ravenswood Family Health Center (RFHC) in East Palo Alto. After serving 12 months as Interim Chief Executive Officer (CEO) she became the Permanent CEO of RFHC in November of 2003. Luisa received her Bachelor of Science degree in Nursing from the University of California, San Francisco (UCSF) School of Nursing in 1977 and her Master’s degree in Public Health (MPH) Policy and Administration from the University of California, Berkeley in 1990. In March 2010, she was inducted into the San Mateo County Women’s Hall of Fame. Recently, Luisa was awarded the 2016 Visionary of the Year Award sponsored by The San Francisco Chronicle and the School of Economics and Business Administration at St. Mary’s College.

Wayne Yost, CPA, CFE

Chief Financial Officer

Wayne Yost has extensive experience in financial management of community hospitals, regulatory compliance, internal and external audit program development, compliance management, financial analysis, and investigation. He is a Certified Public Accountant and Certified Fraud Examiner. He is a member of the California Society of Certified Public Accountants, the Northern California Chapter of Healthcare Financial Management, the American College of Forensic Examiners and the Association of Certified Fraud Examiners. He received a Bachelor of Arts degree in Healthcare Administration from St. Mary’s College in Moraga, CA.

Jaime Chavarria, MD

Chief Medical Officer

Dr. Jaime Chavarria has been in family practice for over 17 years. He was Chief Resident at the Family Practice department at University of Southern California/California Medical Center and received his Medical Degree at the University of California, San Diego, Medical School.  From 1994 to 2002, he worked with the San Jose Medical Center and prior to that he worked in a four family-physician medical group in Los Angeles that served a multi-cultural population. He served as a faculty member and preceptor for the University of Southern California School of Medicine, Family Practice Program at California Medical Center, and was a part-time faculty member at the Whittier Family Practice Program. He is very interested in redesigning healthcare to be more patient centric, efficient, effective and in working with more closely with clinical partners to coordinate care and community groups to address the social determinants of health.

Justin Wu, MD

Associate Medical Director, Family Practice, Clinical Informatics Officer

Originally from the Bay Area, Dr. Justin Wu received his Medical Degree at New York Medical College, and completed his residency training in family medicine at the University of California, San Francisco and San Francisco General Hospital in 2007.  He joined a community clinic in Denver, CO, and served on the faculty at the University of Colorado Family Medicine Residency Program before joining the RFHC medical team at our Belle Haven Clinic (which is now closed and part of our main health center).  He has done international medical outreach and missions in Mexico and Nicaragua.

Yogita Butani Thakur DDS, MS

Chief Dental Director

Dr. Yogita Thakur trained as a dentist in India at the VYWS Dental College and Hospital (1991-1996). She received her Masters of Science in Dental Public Health at the University of Iowa College of Dentistry. She then completed a fellowship at UCSF School of Dentistry’s Centers to Address Disparities in Oral Health and obtained her certificate in Pediatric Dentistry at UCSF School of Dentistry and was chief resident. She was also a Clinical Scholar at UCSF’s School of Global Health from 2008-2010. She has been the recipient of a number of awards, including the AAPHD leveret Award and an NIH funded COHORT Training Grant. Her key interests include childhood caries.

Jessica Chiu, MURP

Development, Planning and Evaluation Director

Jessica Chiu is highly experienced in grant writing and management as well as program planning and evaluation. She joined RFHC in 2013 as its Grants Development Manager, where she not only wrote and packaged grant proposals, but also managed grants throughout their entire life cycles. Prior to joining RFHC, she worked at another federally qualified health center in the Bay Area where she wrote and managed an extensive portfolio of government, foundation, and corporate grants. Jessica holds a Master’s degree in Urban and Regional Planning from the University of California, Irvine and a Bachelor’s degree in Community and Regional Development from the University of California, Davis. She is getting her second Master’s degree in Public Health from the University of California, Berkeley.

Gralyn Jacques

Deputy Chief Financial Officer

Gralyn Jacques served as the Chief Financial Officer (CFO) for the Haight Asbury Free Clinics, Inc. for four years, serving as a Senior Manager of the organization, managing a $12M budget, overseeing contracts and grants management, compliance,  audits, and was responsible for all internal and external reporting.  Prior to this, he was an internal auditor for Old Republic Title Company where he performed tests of the company’s internal controls and also conducted special investigations relating to fraud and defalcations.  Gralyn is also a licensed real estate broker and has represented both buyers and sellers since 2002. He received a Bachelor of Science in Business Administration and Accounting from San Francisco State University. He is in the process of obtaining certifications in Wellness Coaching, Personal and Group Fitness Training, and Nutrition Education.

Erika Simpson

Chief Operations Officer

Erika Simpson is a native of East Palo Alto. She holds a Master’s degree in Public Health, with a focus on global health, from Touro University in Vallejo, CA, and a Bachelor’s degree in Anthropology from Howard University in Washington D.C. Erika has worked with underserved populations throughout her life. She has worked as a mentor and counselor to East Palo Alto youth through the Leadership Training Academy’s summer Community Government Institute, as well as the Programs and Outreach Coordinator of the Community Breast Health Project where she worked with young women under 40 in need of breast cancer screening and diagnostic services.  In 2003 she joined RFHC as the Volunteer Program Coordinator where she established RFHC’s Volunteer Program. She then moved on to hold various roles at RFHC including Interim Clinic Manager and Health Educator. In 2006 she helped establish our second clinic site (which is now closed and part of our main health center) in the Menlo Park Belle Haven neighborhood where she was the Clinic Manager. In 2007 Erika was named the first awardee of the Geiger Gibson Emerging Leader award, presented by the School of Public Health and Health Services at George Washington University, giving national recognition for her accomplishments as an emerging leader in community health.

Teresa Devonshire

Staff Development Director

Theresa Devonshire has over 20 years of experience working in health care. She worked as a critical care nurse for 13 years before moving to the administrative side of health care. She graduated from University of San Francisco with a Master’s degree in Health Care Administration. Prior to RFHC, she worked as a Facility Administrator at DaVita Dialysis Clinic. She has also worked at Johnson & Johnson, Eli Lilly, and Align Technology.

Jaclyn Czaja, M.D.

Associate Medical Director, Pediatrics

Dr. Jaclyn Czaja completed medical training at the University of Michigan’s Medical School in 2007, followed by a three year pediatric residency at the University of Washington in Seattle. In addition to hospital duties, she worked with an inner city, and largely immigrant, population at the Harborview Children and Teen’s clinic. During her residency, she also participated in Seattle Children’s Global Health Pathway; working on a pediatric ward assessing the chronically ill children in Kisii, Kenya. Dr. Czaja is a Stanford graduate with a Bachelor of Arts degree in Human Biology.

Evelyn Ho, MPH

Quality Improvement Officer

A Bay Area native, Evelyn Ho has a long standing commitment to the provision of quality health care in the local community.  Prior to joining RFHC, Evelyn was the Managing Director for Stanford Medicine’s Cardinal Free Clinics, which operates in Menlo Park and East San Jose.  She was responsible for all aspects of regulatory and administrative oversight for the clinics.  She also led educational efforts for Stanford’s Office of Community Engagement, providing medical students with opportunities to partner with local community agencies.  Evelyn was formerly an Epidemiologist for San Mateo County and an Emerging Infectious Disease Coordinator for the California Department of Public Health.  She holds a Master of Public Health from Johns Hopkins University where she was a selected to be a HRSA Training Fellow.

Tosha Larios, DPM, MBA/HCA

Project Specialist

With more than ten years in clinical and executive medicine, Tosha Larios has extensive experience in the health care industry and military leadership. She has held numerous leadership positions prior to coming to RFHC. During her military service, she balanced her responsibilities as a provider serving patients in the Orthopedics/Podiatry clinic and her ever expanding role in executive medicine. She has served as an Education and Training Officer for hospital and clinic staff, as Director of Surgical Services, and as Director for Administration. She earned her Bachelor of Science in Nutrition/Dietetics and Bachelor of Science in Microbiology from the University of Arizona, her MBA/HCA from Northcentral University, and her DPM/DO from Des Moines University. She completed her residency training in Foot and Ankle Surgery at Phoenix VAMC and a wound care fellowship at Gallup, NM IHS prior to joining the United States Navy.

Joseph Ohens, JSD, LL.M, CHC

Compliance Officer

Joseph Ohens is a certified health care compliance and privacy professional with broad experience in developing and implementing an effective compliance program and navigating health care administrative and clinical operations through standards development, deployment, and change management. He joined RFHC from Dignity Health-St. Mary’s Medical Center in San Francisco, where as Director of Programs and a member of the hospital’s nine-member leadership team (2012-2016) he had oversight of Administrative Operations; Regulatory Compliance; Patient Relations & Satisfaction; Physician Relations, Contracts & Payments; Business Development, Strategy & Sales; Telecommunications; Security & Parking Services; and Interpreter Services.  Joseph holds a Juris Scientiae (Doctor of the Science of Law, JSD) and Legum Magister (Master of Laws, LL.M) degrees from the University of California, Berkeley School of Law, and a Legum Baccalaureus (LL.B) degree (JD equivalent) from Lagos State University, Nigeria. He is a member of the Health Section of the American Bar Association (ABA), Health Care Compliance Association (HCCA), American Society for Healthcare Risk Management (ASHRM), and the National Association Medical Staff Services. Joseph is certified in healthcare compliance (CHC), privacy compliance (CHPC), and compliance and ethics (CCEP).

Sonia Santana, MD, OB/GYN

Associate Medical Director, Women’s Health

Dr. Sonia Santana was born in Bogota, Colombia and immigrated to the United States in 1987.  She completed medical school at York College of Osteopathic Medicine in Old Westbury, NY in 2001 and finished her OB/GYN residency at Francis Hospital and Medical Center in Hartford, CT in 2005. Dr. Santana worked in private practice in the East Bay before joining RFHC in 2015. She is also a fellow of the American College of Obstetrics and Gynecology. Dr. Santana has a passion for women’s health and is results-driven in her practice. Her goal is to provide the highest quality care to effectively meet the needs of her patients. In her practice, she emphasizes educating her patients on self-management while involving their families and the community which are at the heart of RFHC’s mission. 

Christy Silva, MBA

Director of Project Planning

Christy Silva had a Bachelor’s degree in Communication Sciences when she worked in the government in El Salvador as a communication advisor. When she moved to the Bay Area she started in an entry-level position at RFHC as a Patient Service Assistant registering patients and checking their insurance. Within a few months she moved to the Billing department and then to the Finance department. She liked finance and decided to go for a Master’s in Business Administration degree, which she earned with honors. Working full-time by day and studying by night, she graduated after two and a half years with a concentration in Project Management. Within a year she was promoted to Project Planning Manager. Her expertise met a critical need to help manage two major projects – the implementation of electronic health records, and project oversight of a major Health Care Innovation grant awarded by the Center for Medicare & Medicaid Services that has intensive reporting requirements on multiple indicators related to management and health outcomes of chronic disease patients. As the Director of Project Planning she continues to work on new initiatives and improvement projects with the vision of whole person care and value based health care.

Kim Rufus

Director of Decision Support and Front Office Operation

Kim Rufus is a native of East Menlo Park, and she is passionate about serving the community that she grew up in. She began her career working at Palo Alto Medical Foundation (PAMF) in 1998 as a Patient Services Representative, and within a year became the lead in her department. In 2001 Kim transferred to the Quality & Planning department, and after five years became a System Analyst III (senior analyst). In 2008, through PAMF’s Community Health Partnership program, Kim began working with RFHC to set up their reporting systems and their databases. In 2010 Kim joined RFHC as a full-time staff. Kim oversees seven departments in RFHC. The departments consist of Decision Support, Health Information Management Systems, IT, Audio Visual, Enrollment and Eligibility, Front Desk, and Call Center. Kim is also pursuing a Bachelor of Science in Business Administration at Notre Dame de Namur University. She is expected to receive her degree in December of 2017.

Pancho Chang, JD

Strategic Business Advisor

Pancho Chang joined RFHC in June 2017 after six years as the Chief Operating Officer at Asian Americans for Community Involvement (AACI) in San Jose, CA. At AACI, he led a team that won a 2012 CMS Health Care Innovation award to reinvent AACI’s enabling services into a Patient Navigation Center, completed the implementation of electronic health records across the enterprise, implemented a New Access Point for AACI’s Federally Qualified Health Center, and obtained National Committee for Quality Assurance certification as a Patient Centered Medical Home. Prior to joining RFHC, Pancho ran the Walter S. Johnson Foundation in Menlo Park, CA; was a programmer at the S.H. Cowell and H.J. Kaiser Family Foundations, implemented and accredited Boston City Hospital’s community benefit program, served as an acting Policy Deputy at HRSA’s Bureau of Primary Care, and developed and ran a community health center in Boston Chinatown. Pancho graduated from Brandeis and Boston Universities and is a member of the California, Massachusetts, and U.S. Supreme Court bars.  He has held legal services, Pew Health Policy and Kellogg National Leadership Fellowships, and was a Fulbright Specialist in 2013 (India) and 2016 (China).  Pancho served as a Board member and Board chair at Asian Health Services in Oakland and was an examiner for the Malcolm Baldrige National Quality awards.  Currently he chairs the Audit Committee at the Cancer Prevention Institute of California.