$TDOC Teladoc's revenue has grown from $123 million in 2016 to $418 million last year. Over the long term, the company is targeting a 20-30% top line growth rate. It expects about $550 million in revenue this year. Teladoc's membership has climbed from 12.2 million at the start of 2016 to 22.8 million at the beginning of 2019. The percentage of members actually taking advantage of the service has doubled over that time period.