Patients must then schedule a testing appointment, which will be done curbside, so patients do not need to enter the office. To schedule your appointment, call our Macomb office at (586) 716-1371 or our Marysville office at (810) 364-4000. PHCN Offices Open & TeleHealth Appointments Now AvailablePatient Information‧Locations/Clinics‧Find a Physician‧Contact‧Services‧About Us.