David P. Donohue, MD, MS, DipABLM,is a fellow of the American College of Physicians and a diplomate of the American Board of Lifestyle Medicine. Since 2000, he has been practicing primary care internal medicine and is co-owner and Chief Medical Officer of Progressive Health of Delaware. He is a founder of the Lifestyle Medicine Network to benefit patients and lifestyle medicine providers and has chaired the American College of Lifestyle Medicine’s Provider Network since 2018. Launched in October 2020, he created HealthRules.org to help people prevent and reverse the underlying cause of disease by promoting key steps to make an impact on their health and hosts the HealthRules podcast. He is also the creator of Health Challenge Delaware, a community-wide health improvement event held every October. Beginning in 2020, he was appointed chair of the Medical Society of Delaware Environmental Health Subcommittee based on his interest in climate change and its effects on health. His expertise is in devising better systems of health care delivery by employing lifestyle medicine and health information technology. He is passionate about using plant-based nutrition and sustainability medicine to achieve patient health, environmental health, and the quintuple aim in health care.