Sleep Center - Northfield Hours: By appointmentTo make, change or cancel an appointment, please call 507-646-1099. Services Care Team 2000 North AvenueNorthfield, Minnesota 55057Phone: (507) 646-1099Get Directions Services at This Location Sleep Center Our Team of Doctors and Providers Hoff, Bryan MDSleep CenterView Profile O’Halloran, Gerard MDAudiologyView Profile Zell, Stacey LRTSleep CenterView Profile