Our Physicians

Dr. John C. Booker

John C. Booker, M.D.

Dr. John C. Booker graduated from the University of Southern California Medical School after obtaining his Bachelor of Science in biochemistry at the University of California Davis. He completed his residency at the University of California Davis Family Practice Residency Program. Dr. Booker began private practice with Visalia Family Practice in 1984. He is board certified with the American Board of Family Practice and a member of the California Medical Association and the Tulare County Medical Society.

Dr. Mark Tetz

Mark V. Tetz, M.D.

Dr. Mark Tetz received his medical degree from the University of Calgary in Calgary, Alberta, Canada after completing undergraduate work in cellular, molecular and microbiology. He completed his residency at the University of Calgary Foothills Hospital. He moved to Visalia in 1996 where he was in private practice at KSMG Primary Care until 2000 when he joined Visalia Family Practice. Dr. Tetz is board certified with the American Board of Family Practice and a member of the Tulare County Medical Society, the American Diabetes Association and the California Medical Association.

Dr. Christopher J. Rodarte

Christopher J Rodarte, M.D.

Dr. Christopher J. Rodarte attended medical school at the University of California Irvine after graduating from California State University, Fresno with his Bachelor of Science in Functional Biology. After completing his residency at Merrithew Memorial Hospital Family Practice Residency Program in Martinez, California he became a staff physician for United Health Centers. In 1997 he moved to Family HealthCare Network where he was a staff physician and served for a time as Medical Director. Dr. Rodarte is board certified with the American Board of Family Practice and is an Adjunct Faculty-Associate Professor with A.T. Still University School of Osteopathic Medicine.


Dr. Elizabeth Sasaki

Dr. Elizabeth Sasaki received her medical degree from the Oklahoma State University College of Osteopathic Medicine . After completing her residency atBotsford General Hospital she practiced for the National Helath Service Corps in Earlimart, CA. She was in Private Practice for over 30 years before joining Visalia Family Practice.She specializes in Osteopathic Manipulation and is Board Cerrified with the Americal College of Osteopathic Family Practice. She is dedicated to serving our community and is fluent in Englis, Spanish, And Japanese.

Our Care Givers

Kourtney Umphfres

Kourtney Umphfres, PA-C

Kourtney is a Physician Assistant with her Master of Science in Physician Assistant Studies from the Arizona School of Health Sciences. She is Board Certified with National Commission on Certification of Physicians Assistants. She has 16 years of experience in Family Medicine in Visalia and Exeter. She possesses a broad range of knowledge in adult medicine, women's health and pediatrics with additional experience in minor surgical procedures.

Maria Yepiz-Wang

Maria Yepiz-Wang, FNP - BC

Maria Yepiz-Wang is a Family Nurse Practitioner with her Master in Nursing Science.She specializes in Family Health and is focused on providing excellent patient care from General Family Medicine and Women’s Health. She has 6 years of Experience as an FNP with Visalia Family Practice and was an ICCU Nurse at Kaweah Delta Medical Center for 10 years. Maria is bilingual and is board certified through the American Nurse’s Credentialing Center.