By 2018, there will be over 2,800 retail health clinics in the U.S., nearly 50 percent more than in 2014. Traditionally, retail clinics offered a limited array of services focused on treating mild or seasonal medical issues, such as illness, preventative care and vaccinations, and basic low-level health services. As their popularity has steadily grown, due to their convenience when a problem may not be seen as important enough for a primary care visit, walk-in availability, and extended hours of operation, retail clinics have to accommodate the rise in patients. Now, these companies have shifted their focus towards expanding services, investing in technological capabilities, and growing patient volume.