The lifestyle medicine core competencies were developed by a committee of physicians from several medical specialties to provide guidance on the knowledge and skills needed for physicians to provide high quality lifestyle interventions that optimize chronic disease outcomes. These competencies were published in the Journal of the American Medical Association (JAMA) in 2010 and used as the foundation for the first lifestyle medicine course and for the lifestyle medicine board certification examination. In the ensuing years, interest in the field and application has expanded to a variety of health professionals. With evolution of the lifestyle medicine evidence-base, the competencies have been updated. This article sums up the changes in their organization and content. Regular updates are anticipated to align with the ongoing scientific studies and evolution of the field.