OPD - Out Patient Department
Out Patient Department is considered to be the first point of contact between the patient and the hospital staff. A patient when enter the hospital for the first time, goes to the "Out Patient Department", now the staff of OPD decides to which department a patient should go.
Normally an Out Patient Department is found on the ground flour of any hospital and may be divided in to multiple bays like : different OPDs for Neurology, Gynecology, Orthopedics and General Medicine. A patient has to complete all the formalities here only before going to the respective department.