Dr. Lillian LeongD.O.

Family Medicine

at LL Integrative Life — Walnut Creek, CA

About

Dr. Lillian W. O. brings more than a decade of clinical experience to her work in integrative, functional, and osteopathic medicine. Her curiosity about alternative healing began in the late 1980s with energy medicine, colorpuncture, Reiki, and essential oils. She earned a Master's degree in Biological Sciences, completing original research into the antimicrobial activity of plants used in folk remedies. She then studied osteopathic medicine at Western University of Health Sciences and completed her Family Medicine residency at the University of California, Davis.

Dr. Leong holds board certification in Family Medicine and boards in Integrative Medicine through both ABIHM and ABPS. She trained in functional medicine with the Institute of Functional Medicine and studied clinical herbology with Dr. T. Low Dog. Her clinical focus spans gut health, hormone imbalances, skin health, biofeedback, and herbal therapy. S. Congress and the State of California first inspired her path into integrative care. She draws patients in as active partners, building plans that weave conventional and complementary approaches into something sustainable. Outside the practice, she is a wife and mother of two high-energy, creative boys.

Education & Training

Undergraduate

Master's degree in Biological Sciences, research into antimicrobial activity of plants used in folk remedies

Medical School

Western University of Health Sciences, osteopathic medicine

Residency

Family Medicine residency, University of California, Davis

Fellowship

Institute of Functional Medicine, functional medicine training; clinical herbology with Dr. T. Low Dog

Certifications

Board Certified in Family Medicine
Boarded in Integrative Medicine by ABIHM
Boarded in Integrative Medicine by ABPS

Conditions Treated

gut-brain health disorders
hormone imbalances
skin conditions
fatigue
autoimmune disease
food sensitivities

Who is Dr. Leong right for?

Dr. Leong is a strong fit for adults seeking a root-cause approach to complex or chronic health concerns. Patients dealing with gut issues, hormone imbalances, skin conditions, or autoimmune disease benefit from her integrative lens. She works well with those who want conventional and complementary tools woven together into one plan. Patients who prefer an active role in their own care tend to thrive with her approach.

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Frequently Asked Questions

Dr. Leong treats a broad range of conditions including gut-brain health concerns, hormone imbalances, skin conditions, fatigue, and autoimmune disease. She takes a root-cause approach, looking at how body systems interact rather than addressing symptoms in isolation.

Dr. Leong builds care plans using osteopathic manipulative treatment, biofeedback, herbal therapy, nutraceuticals, dietary counseling, and mindfulness. She selects tools based on each patient's individual needs, blending conventional and complementary approaches.

Yes. Dr. Leong holds board certification in Family Medicine and boards in Integrative Medicine through both ABIHM and ABPS. She also trained in functional medicine with the Institute of Functional Medicine and studied clinical herbology with Dr. T. Low Dog.

Dr. Leong studied osteopathic medicine at Western University of Health Sciences. She completed her Family Medicine residency at the University of California, Davis. She also holds a Master's degree in Biological Sciences, where she researched the antimicrobial activity of plants used in folk remedies.

Yes. Dr. Leong co-manages care alongside each patient's primary care physician. This collaboration ensures her integrative work complements, rather than replaces, any conventional care a patient already receives.

Dr. Leong's interest in plant-based healing stretches back to the late 1980s. She completed original graduate research into the antimicrobial activity of folk remedy plants and later studied clinical herbology directly with Dr. T. Low Dog.

Yes. Dr. Leong offers telemedicine appointments for patients who prefer remote visits. Contact the practice directly to schedule a telehealth consultation.

Dr. Leong integrates osteopathic, functional, and integrative medicine into every care plan. Rather than treating isolated symptoms, she works to identify the upstream cause of a patient's concerns. She uses tools like biofeedback, herbal therapy, and mindfulness alongside conventional medicine.

Doctor profile last updated March 21, 2026