The Health Resources and Services Administration (HRSA) of the U.S. Department of Health and Human Services defines telehealth as the use of electronic information and telecommunications technologies to support and promote long-distance clinical health care, patient and professional health-related education, public health and health administration. Technologies include videoconferencing, the internet, store-and-forward imaging, streaming media, and terrestrial and wireless communications.
Telemedicine includes a variety of technologies and tactics to deliver virtual healthcare. Telemedicine is considered a subset of telehealth. The latter includes provider-to-provider remote training opportunities and mobile health apps designed to promote health and engage patients. Telemedicine is a specific kind of telehealth that involves clinicians providing medical services to patients.
See Research Brief No. 22, Telemedicine: Decreasing Barriers and Increasing Access to Healthcare, for a more detailed discussion on the benefits of telemedicine.