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    

231-672-6452

Medi Center

231-672-6430

Physician Billing (Primary Care)

231-672-4900

Sleep Center

231-672-6186