An outpatient ward can also be referred to as a clinic, ambulatory care center, or outpatient department. A clinic provides a range of medical services to patients who do not require admission to a hospital. An ambulatory care center offers medical treatment and diagnostic services on an outpatient basis, including primary care, specialty care, and emergency care. An outpatient department provides medical services to patients who do not need to be hospitalized, such as assessments, tests, and treatments. Another synonym for an outpatient ward is a day surgery or day treatment unit, where patients are treated and recover from their procedure within the same day, without the need for an overnight stay.