The hours of operation for outpatient services at University of Michigan Hospitals and Health Centers can vary depending on the specific department or service line. Generally, outpatient services are available on weekdays, often opening between 7:00 AM and 8:00 AM, and closing between 5:00 PM and 6:00 PM. Some departments may offer extended hours or weekend availability to accommodate patients' needs. For the most accurate and detailed information regarding the specific outpatient service one may be interested in, it is advisable to refer to the official website. There, visitors can find the current hours of operation along with any additional details specific to various outpatient services.