Dr. Shelley O'NeillMD
Family Medicine
at True Health Center for Precision Medicine — El Dorado Hills, CA
About
Dr. Shelley O'Neill brings an unusually broad clinical foundation to her work at True Health Center for Precision Medicine. She earned her Bachelor of Science in Biological Sciences from Clemson University and her medical degree from the Medical University of South Carolina in Charleston. In 1999, she moved to California to begin her Family Practice residency at UC Davis/Sutter, where she was selected as Chief Resident.
After residency, Dr. O'Neill completed advanced fellowship training in high-risk surgical obstetrics in Spokane, Washington, a specialization few family physicians achieve. She has since practiced across the full spectrum of Family Medicine. Colleagues and staff describe her clinical work as marked by intellectual rigor, curiosity, and clinical mastery.
Education & Training
Undergraduate
Clemson University, B.S. Biological Sciences
Medical School
Medical University of South Carolina, Charleston
Residency
Family Practice, UC Davis/Sutter (Chief Resident)
Fellowship
High-Risk Surgical Obstetrics, Spokane, Washington
Who is Dr. O'Neill right for?
Dr. O'Neill suits patients who value a physician with broad clinical experience and deep diagnostic thoroughness. Her background spanning Family Medicine, obstetrics, and functional medicine makes her well suited to patients with layered or complex presentations. Adults seeking a physician with exceptional range and rigor will find her approach compelling.
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Frequently Asked Questions
Dr. O'Neill earned her medical degree from the Medical University of South Carolina in Charleston. She completed her Family Practice residency at UC Davis/Sutter in California, where she served as Chief Resident.
Dr. O'Neill completed a fellowship in high-risk surgical obstetrics in Spokane, Washington, an advanced qualification that few family physicians hold. Combined with her chief residency and broad clinical experience, she brings exceptional range to her practice.
Dr. O'Neill practices Family Medicine and Functional Medicine. Her training spans a wide clinical spectrum, and she brings that breadth to precision and root-cause medicine at True Health Center for Precision Medicine.
No. Dr. O'Neill grew up in South Carolina and attended Clemson University before earning her medical degree in Charleston. She relocated to California in 1999 to begin her residency at UC Davis/Sutter.
Dr. O'Neill brings intellectual rigor and clinical mastery to each patient encounter. She applies a root-cause, evidence-based methodology consistent with the practice's precision medicine philosophy. Her broad training allows her to evaluate patients from multiple clinical angles.
Doctor profile last updated September 17, 2026