Urgent care centers are also known as walk-in clinics. They are facilities where you can access basic medical services for different health problems. The beauty of urgent care centers is that you can access medical care when you cannot reach your regular doctor (PCP). They are generally opened from 8:00 A.M. to 8:00 P.M.
On the other hand, emergency rooms offer medical care for all health problems including strokes, heart attacks, pregnancy complications and belly pains 24/7.