Hospital/Medical Center; Specialty Care; Cancer Care; ... Mammography; Address. 500 South Oakwood Rd Oshkosh, WI 54904. Phone. 920-223-2000 Appointments. 920-223-2000 Departments. Birthing Center. Hours Open 24 hours a day/ 7 days a week. Phone 920-223-0220. ... Using your own secure password, you can log into the online patient portal 24 hours ....