General Phone Directory

 Main Number

 231-672-2000 or Toll Free 1-800-368-4125 

 Billing

 888-777-6433

 Business Office

 800-224-7599

 Express Testing

 231-672-6494

 Laboratory

 231-672-6460

 Laboratory Customer Service

 231-672-6259

 Great Lakes Specialty Hospital    

 231-728-5837

 Medi Center

 231-672-6430

 Physician Billing (Primary Care)

 866-739-4900

 Sleep Center

 231-672-6186