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    William C. Bayer, MD

    Endocrinology, Diabetes & Metabolism

    Dr. Bayer's Overview

    Dr. Bayer graduated from the Loyola University Chicago Stritch School of Medicine in 1986. He works in Carol Stream, IL and specializes in Endocrinology, Diabetes & Metabolism. Dr. Bayer is affiliated with Central DuPage Hospital.

    Dr. Bayer's Experience

    Years in Practice: 31

    Procedures Performed by Dr. Bayer

    Dr. Bayer's Specialties

    Endocrinology, Diabetes & Metabolism

    Dr. Bayer's Education & Training

    Medical School: Loyola University Chicago Stritch School of Medicine; Graduated 1986

    Dr. Bayer's Rating

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    Overall Rating


    • Explains conditions & treatments
    • Takes time to answer my questions
    • Provides follow-up as needed
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    Dr. Bayer's Accepted Insurance

    Please verify insurance information directly with your doctor's office as it may change frequently.

    • Aetna HMO
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
    • BCBS Blue Card PPO
    • CIGNA LocalPlus
    • CIGNA Open Access Plus
    • Coventry Health and Life IL PPO
    • View More

    Dr. Bayer's Office Information & Appointments

    Office Locations

    Northwestern Medicine

    501 Thornhill Dr
    Carol Stream, IL 60188
    (630) 517-3290


    Office Hours and Information

    Fax: (630) 668-3505

    Practice Website: Not Available

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: Yes

    Monday 8:00 AM - 4:30 PM
    Tuesday 8:00 AM - 4:30 PM
    Wednesday 8:00 AM - 4:30 PM
    Thursday 8:00 AM - 4:30 PM
    Friday 8:00 AM - 2:30 PM
    Saturday Closed
    Sunday Closed

    Other Physicians in Dr. Bayer's Practice

    Dr. Bayer's Hospital Affiliations

    Office Locations