Digital health is an overarching category including mHealth, health information technology, wearable devices, telehealth and telemedicine, and personalized medicine. Healthcare providers and other stakeholders use digital health to improve access, reduce costs, improve efficiency and quality, and make care more personalized. Healthcare providers use digital healthcare technologies to deliver care transcending time and distance. Patients and healthcare consumers use digital health to manage and track their health and wellness. Health systems managers use digital interventions to improve quality of care and to help with state and federal regulatory compliance and reporting. Data services interventions entail crosscutting functionality necessary for data collection, management, use, and exchange. This chapter provides the definitions of mHealth, telehealth, telemedicine, and wearables. It details the benefits of use of healthcare technologies and the challenges and pitfalls for patients and providers relating to health information technologies. It concludes with a discussion of the future direction of mHealth, telehealth, and wearables.