Luisa Buada, RN, MPH. Chief Executive Officer

Luisa Buada has over 38 years of 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 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 of 2010, Buada was inducted into the San Mateo County Women’s Hall of Fame. In 2013 she received the California Senate Woman of the Year Award for the 13th District from Senator Jerry Hill. She was a 2016 Visionary of the Year Award Honoree sponsored by The San Francisco Chronicle and the School of Economics and Business Administration at St. Mary’s College and received the 2016 John W. Gardner Exemplary Leadership Award from the American Leadership Forum of Silicon Valley. In 2018, she received the California State Assembly Woman of the Year award for the 24th District from Assemblyman Marc Berman.

Gralyn Jacques. 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 became Ravenswood Family Health Center’s CFO in March 2019. 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.

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.

Yogita Butani Thakur DDS, MS. Chief Dental Officer

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.


Natalie Hodgen, LVN. Director of Clinical Operations

Natalie Hodgen has been in healthcare for a little over 30 years. Starting as a Licensed Vocational Nurse (LVN), Natalie has had several roles in healthcare, including direct patient care, healthcare management and as a nursing instructor. Her work and passion has been in community health, over the past 15 years. After raising her children, and graduating from UCSF’s Clinic Leadership Institute, Natalie went back to school to complete her Bachelor’s Degree in Healthcare Administration. Natalie has also had the opportunity to sit on the Advisory Boards of vocational schools, and enjoys mentoring up and coming leaders in healthcare. Outside of healthcare, Natalie enjoys traveling, attending live entertainment (from sports to off-Broadway musicals), and spending time with her family. Natalie is currently pursuing her Master’s Degree in Healthcare Administration from Southern New Hampshire University.


Jessica Yee, MURP, MPH. Development, Planning and Evaluation Director

Jessica Yee is highly experienced in grant writing and management as well as program planning and evaluation. She joined RFHC in 2013 as its Grant 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 received her second Master’s degree in Public Health from the University of California, Berkeley in 2018.


Terri Thomas, Director of the Billing Cycle 

Terri Thomas has obtained a wealth of knowledge serving various roles within previous Billing departments. Terri served as the Billing Manager for HealthRIGHT360 for 15 years. Prior to this position, her role at HealthRIGHT 360 was Substance Abuse and Behavioral Health Biller for the City and County of San Francisco while balancing night school to obtain knowledge on how to bill medical services. She worked with this organization from the beginning when it was divided into two health clinics, Haight Ashbury clinic and Walden House. Throughout the years this organization partnered with numerous organizations such as Glide medical clinic and Lyon Martin Health LGBTQ Services. These previous experiences have led her to an exciting transition as the Director of the Billing Cycle here at Ravenswood Family Health Center.


Sandra Escobar, PhD. Integrated Behavioral Health Services Clinical Director

Dr. Sandy Escobar obtained her BA in Psychology at UCLA, and completed her doctoral in Psychology at the California School of Professional Psychology, San Diego. Since 1995, Dr. Escobar has held several leadership and clinical positions working in community behavioral health programs serving the neediest and most disadvantage individuals in our communities. Her professional track record includes successful advocacy of an integrative approach to services, building community partnerships, implementing new programs and advocacy for community culturally appropriate evidenced-based clinical therapies, outcome driven services and clinical supervision for postdoctoral students.  Before joining Ravenswood, Dr. Escobar was the Senior Division Director for a large nonprofit community organization providing leadership and managing a large-scale multi-million-dollar health division.

Varsha Gadgil, RPH, PIC. Pharmacy Director

Varsha Gadgil is Pharmacy Director at Ravenswood Family Health Center. She started working at RFHC as locum Pharmacist in the small dispensary. She was instrumental in growing the small dispensary to a Licensed Pharmacy. She had to work with multiple agencies to establish inventory, licensing and setting up pharmacy software systems. She successfully implemented ten new insurance plans, and transitioned legacy plans to electronic claims. She has set up an ongoing collaboration with HPSM and their Pharmacy and therapeutics committee. She launched the Pharmacy and therapeutics committee here at RFHC. She ensured that the Pharmacy meets compliance requirements, and efficiently addresses any concerns including those from patients regarding dispensing practices. She continues to work diligently to expand Pharmacy services at RFHC. Varsha received her Master of Pharmacy degree from S.N.D.T University, India. Previously she was an Inpatient Pharmacist at Kaiser Permanente where she was instrumental in setting up a new Inpatient Pharmacy. She has done medical and community outreach work abroad. She also participated in fundraising initiatives for funding small businesses for underprivileged women. In her free time she enjoys reading, hiking, and travelling with her family.

Jaclyn Czaja, MD. 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.

Sonia Menchavez, OD, MPH. Optometry Director

Dr. Sonia Menchavez received her Doctor of Optometry degree as well as her Master in Public Health at University of California, Berkeley. While studying at UC Berkeley, she was the first optometry student to receive the Albert Schweitzer Fellowship which is designed to prepare the next generation of leaders to address underlying causes of health inequities. Dr. Menchavez is passionate about developing sustainable vision care for underserved communities. As the Optometry Director at Ravenswood, she has played an integral part in developing the clinic’s first in-house optometry department. In her spare time she enjoys hiking, salsa dancing and spending time with family.

Diana Mokaya, MD. Associate Medical Director, Family Practice

Dr. Mokaya earned her undergraduate degree from Yale University and her medical degree from the University of Pittsburgh School of Medicine. She completed her Family Medicine residency at O’Connor Hospital in 2016, which included training in maternity, infant, pediatric, and adult care within a diverse patient population.  She is committed to caring for underserved populations through systems improvement and governmental advocacy. Her practice, which includes prenatal care and women’s health in addition to family medicine, is open to all patients, including newborns, children, adults, and pregnant patients.




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. Quality & Project Management Officer

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 completed a Bachelor of Science in Business Administration at Notre Dame de Namur University in May of 2018.