About
Dr. William King-Lewis is a board-certified family physician and Navy veteran with over six years of clinical experience in urgent care, military medicine, and family practice. He earned his MD from the Uniformed Services University of the Health Sciences and completed a transitional year internship at Naval Medical Center San Diego. His Family Medicine residency training took place at Naval Hospital Camp Pendleton, where he developed deep expertise across acute and preventive care. He holds board certification as a Diplomate of the American Board of Family Medicine and serves as an Associate Professor of Family Medicine. He is also FMCSA certified to conduct DOT and CDL physicals.
Dr. King-Lewis is a member of both the American Academy of Family Physicians and the American College of Occupational and Environmental Medicine. He has conducted virtual appointments since 2017 and brings particular clinical focus to functional medicine, metabolic and hormonal health, weight optimization, veteran healthcare, and TRICARE coordination. He and his wife Maud, along with their two dogs Boomer and Poppy, are moving to the Mayfair community in 2027. His goal is simple: give every patient a doctor who listens and does not rush them out the door.
Education & Training
Medical School
Uniformed Services University of the Health Sciences (USUHS)
Residency
Family Medicine, Naval Hospital Camp Pendleton
Additional Training
Transitional Year Internship, Naval Medical Center San Diego; Associate Professor of Family Medicine
Certifications
Conditions Treated
Who is Dr. King-Lewis right for?
Dr. King-Lewis is a strong fit for adults, families, and children who want an unhurried, relationship-driven primary care experience. Veterans, active-duty service members, and their families benefit from his military medicine background and TRICARE coordination. Patients managing chronic conditions such as diabetes, hypertension, thyroid disorders, or hormonal imbalances will find his functional and preventive approach well-suited to their needs. Busy professionals and patients who need same-day or virtual access also fit well in his panel. He serves patients of all ages across the New Braunfels area and the broader San Antonio-Austin corridor.
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Frequently Asked Questions
Dr. King-Lewis treats a broad range of conditions including diabetes, hypertension, thyroid disorders, metabolic disorders, anxiety, depression, ADHD, hormonal imbalances, and menopause. He also manages UTIs, STIs, and weight-related concerns. His clinical scope covers preventive care, chronic disease management, and same-day urgent care needs.
Yes. Dr. King-Lewis holds board certification as a Diplomate of the American Board of Family Medicine. He is also FMCSA certified to perform DOT and CDL physicals.
Dr. King-Lewis earned his MD from the Uniformed Services University of the Health Sciences. He completed a transitional year internship at Naval Medical Center San Diego and his Family Medicine residency at Naval Hospital Camp Pendleton.
Yes. S. Navy and understands the specific healthcare needs of military families. He welcomes active-duty, retired, Guard, and Reserve patients and coordinates care through TRICARE plans.
Dr. King-Lewis takes an evidence-based, patient-first approach. He focuses on listening without rushing, addressing root causes through functional medicine, and empowering patients with clear information. He draws on training in family, military, and occupational medicine to deliver comprehensive care.
Yes. Dr. King-Lewis has conducted virtual appointments since 2017. Mayfair Primary Care plans to launch telehealth services in early 2026 for patients across Texas, ahead of the physical clinic opening in 2027.
Dr. King-Lewis offers hormone therapy, testosterone evaluation and treatment, weight management, micronutrient assessment, vitamin and nutrient injections, IV treatments, PRP, prolotherapy, and sports optimization. He also performs DOT physicals, travel medicine consultations, and occupational medicine exams.
Yes. Dr. King-Lewis sees patients of all ages, including children. His practice offers school and sports physicals and routine pediatric and family care.
Dr. King-Lewis is a member of the American Academy of Family Physicians and the American College of Occupational and Environmental Medicine.
Doctor profile last updated March 22, 2026