Appointments should be available on the same day patients need to see their doctors. It is sometimes necessary to take an urgent approach to healthcare under the guidance of a trusted doctor. It is for this reason that some physicians always reserve some extra time each day for patients who need same-day appointments.   It may be necessary to visit the emergency room, urgent care, or walk-in clinic instead if you cannot schedule a doctor's appointment on the same day as the illness or injury. Patients who need more immediate care benefit from same-day appointments as well as physicians.