Dr. William Jonathan Koble

Dr. William Jonathan Koble is a highly respected Family Medicine and Internal Medicine Specialist with more than 34 years of extensive clinical experience. He has been associated with Marshall Sierra Primary Medicine in Placerville, California, where he provides comprehensive primary care services. Dr. Koble is known for his patient-focused approach, emphasizing preventive healthcare, early diagnosis, and chronic disease management. Over the years, he has treated thousands of patients and established himself as a trusted healthcare provider within the community.

Dr. Koble has participated in several clinical research programs focusing on hypertension, diabetes, and preventive care methodologies. His research work aims to enhance patient wellness through innovative, evidence-based treatments.

• 1998 – Excellence in Family Medicine Award, California Medical Association

• 2007 – Community Healthcare Leadership Award, El Dorado County

• 2018 – Lifetime Achievement Award in Primary Healthcare, Marshall Healthcare Network

William Koble, MD has joined Marshall Sierra Primary Medicine in Placerville. He is board certified in family medicine and provides a full spectrum of care for patients of all ages. Dr. Koble earned his undergraduate degrees at UC San Diego before continuing on to receive his degree in medicine from the University of Southern California. Dr. Koble completed his internship and residency at Camp Pendleton Naval Hospital and then served at Naval Hospital in Lemoore, California as a family practice physician and United States Naval Medical Officer. He then continued his career with a medical group in Spokane, Washington before returning to the San Joaquin Valley. Dr. Koble joins Marshall following many years of caring for patients at Visalia Medical Clinic. He enjoys backpacking, fishing, gardening and spending time with his wife, three children, and dogs. Contact your health insurance company to verify that Marshall Hospital and its affiliated physicians accept your health plan.