Mercy Medical Center, officially Ascension Northeast Wisconsin Mercy Hospital, is a hospital founded in 1891 that serves the city of Oshkosh, in Winnebago County, Wisconsin. Its emergency department is a level III trauma center. Ascension NE Wisconsin ? Mercy Campus proudly serves the Oshkosh community by providing comprehensive healthcare, including emergency and trauma care, surgery, and a span of specialties such as heart care, cancer care, orthopedics and sports medicine, birthing, neurosurgery, inpatient rehabilitation, and more. With 157 patient beds and more than 300 medical staff, Ascension Mercy Hospital treats patients with dignity and compassion. The doctors, nurses and staff are committed to providing the expert, personalized care that you and your family deserve.