Urgent Care Centers have been around since 1970s. Physicians wanted practices with extended hours that focused on acute but non-emergent care. Originally referred to as a “doc-in-a-box,” the use of urgent care centers declined in the 1980s. However, over the last two decades, the urgent care market has boomed. Now, they are growing more in popularity, availability, convenience and quality. With more physicians, companies and hospitals investing in urgent care centers, that high-quality level of care is becoming available to more people. According to the Urgent Care Association of America, more than 9,000 urgent care clinics are dispersed throughout the United States, with more opening up every day. But like all business, they had to start somewhere. The Top 15 Urgent Care Influencers list details the hard work of the founders, CEOs and managers of this booming industry from its beginning to the present.