According to the U.S. Department of Health and Human Services, Telehealth sometimes called Telemedicine: 

is the use of electronic information and telecommunication technologies to provide care when you and the doctor are not in the same place at the same time.


Some sources date Telehealth back to the Civil War, when over 15,000 miles of Telegraph wire were laid, which provided military leaders the ability to communicate medical supply requests and casualties over long distances. In the internet age, Telehealth has seen explosive growth since its use was incorporated into an official Medicare program beginning in 2002 for rural patients in Health Professional Shortage Areas, and more recently as patients were forced to isolate during the global COVID-19 Pandemic.