Mesa’s Primary Care and Wellness Expert

Dr. Preston Ashby is a board-certified physician with over 10 years of experience addressing the unique health needs of adult patients. He provides comprehensive health care for the Mesa community that goes beyond checking boxes and handing out prescriptions.

Primary Care Rooted in Prevention & Personalized Care

Dr. Ashby’s approach to care goes beyond simply masking symptoms with medications. He takes the time to understand your individual health goals, working closely with you to develop a treatment plan customized to your lifestyle. Whether managing chronic conditions like diabetes or helping individuals achieve their weight loss goals through medically supervised programs, Dr. Ashby strives to empower patients to take control of their health and well-being. His focus on internal medicine makes the practice uniquely equipped to help adults navigate a wide range of health concerns and improve their quality of life.

Dr. Preston Ashby is committed to being your trusted health partner. If you’re looking for a compassionate, knowledgeable primary care provider to help manage your health and wellness, request an appointment today.

Dr. Preston Ashby is a board-certified internal medicine physician dedicated to helping adults in Mesa achieve lasting health. After six years in hospital medicine managing complex cases, he returned to his hometown to focus on what he believes matters most—preventing illness before it starts. His practice blends traditional primary care, chronic disease management, and medical weight loss with a strong emphasis on fitness, nutrition, and lifestyle-based healing.

A Doctor Who Knows Mesa—And Its People

Born and raised in Mesa, Dr. Ashby completed medical school and residency right here in Arizona. His deep connection to the community drives his commitment to providing high-quality, compassionate care to his neighbors. Outside the office, he enjoys spending time with his wife and three children and reconnecting with nature through hunting and fishing—activities that inspire his holistic approach to health.

If you’re looking for a primary care provider who prioritizes prevention, wellness, and patient-centered care, schedule an appointment today. Together, you and Dr. Ashby can build a plan for lifelong health.

Insurance Accepted

Dr. Preston Ashby is in network with UnitedHealthcare and accepts both Medicaid and Medicare. He is committed to helping the Mesa community access health care–if you have a different insurance than what’s listed here, please contact the practice to discuss how we can help you.