Mayo Clinic Customer Service Phone Numbers Customer Service: 480-301-8000 Appointment Office: 480-301-1735, 800-446-2279 (toll-free) Insurance and billing: 480-301-7033, 800-603-0558 (toll-free outside Phoenix) International Patients Center: 480-301-7101 Medical records requests (Arizona patients only): 480-301-4211 Medical records requests fax for
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