Urgent care clinics treat injuries, illnesses, and ailments that require immediate attention but are not life-threatening. Most urgent care centers are open at least twelve hours a day on weekdays and keep later, longer regular business hours. It is not uncommon for centers to open as early as 7 a.m. and close as late as 12 p.m. for the convenience of patients. This makes them a convenient alternative to a mid-week appointment with ...