Teladoc Health, Inc., formerly referred to as Teladoc, Inc. and Teladoc Medical Services, is a multinational telemedicine and virtual healthcare company based in the United States. Primary services include telehealth, medical opinions, AI and analytics, and licensable platform services. In particular, Teladoc Health uses telephone and videoconferencing software as well as mobile apps to provide on-demand remote medical care. Billed as the first and largest telemedicine company in the United States, Teladoc Health was launched in 2002 and has acquired companies such as BetterHelp in 2015, Best Doctors in 2017, and Advance Medical in 2018. It trades on the NYSE and in 2019 was active in 130 countries and served around 27 million members. Teladoc was founded in 2002 in Dallas, Texas by G.Byron Brooks EE MD and Michael Gorton. Billing itself as the oldest telemedicine company in United States, Teladoc's initial business model allowed patients to remotely consult with state-licensed doctors at any time. Companies paid a monthly fee for their employees to access the service, while patients paid a flat fee for each consultation, originally about $35 to $40. With Gorton as both chairman and CEO, Teladoc launched nationally in 2005 at the Consumer Directed Health Care Conference in Chicago, Illinois. Teladoc had around 1 million members by the end of 2007, with large employers such as AT&T providing the service to employees as a health benefit.