An urgent care center , also known as an urgent treatment centre in the United Kingdom, is a type of walk-in clinic focused on the delivery of urgent ambulatory care in a dedicated medical facility outside of a traditional emergency department located within a hospital. Urgent care centers primarily treat injuries or illnesses requiring immediate care, but not serious enough to require an ED visit. In the United Kingdom, urgent treatment centres are provided by the National Health Service, which decided in 2019 that all areas of England should be served by a network of urgent treatment centres. In the United States, urgent care centers were first used in the 1970s and have since expanded to approximately 10,000 centers across the country.