A walk-in clinic describes a very broad category of medical facilities only loosely defined as those that accept patients on a walk-in basis and with no appointment required. A number of healthcare service providers fall under the walk-in clinic umbrella including urgent care centers, retail clinics and even many free clinics or community health clinics. Walk-in clinics offer the advantages of being accessible and often inexpensive. However amongst the negative aspects are that walk-in clinics provide poor quality healthcare as opposed to professional healthcare such as regular doctors and hospitals. Other disadvantages may include the urgency to make the patient’s visit as quick as possible in order to reduce the long waiting list of walk-ins at the clinic, which may fail to fulfill the purpose of the visit.