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    Dr. Gary I. Portnay, MD

    Endocrinology, Diabetes & Metabolism, Internal Medicine

    • (781) 505-8780

    Dr. Portnay's Overview

    Dr. Portnay graduated from the Rosalind Franklin University/ Chicago Medical School in 1968. He works in Billerica, MA and specializes in Endocrinology, Diabetes & Metabolism and Internal Medicine. Dr. Portnay is affiliated with Winchester Hospital.

    Dr. Portnay's Experience

    Years in Practice: 48

    Dr. Portnay's Specialties

    Endocrinology, Diabetes & Metabolism, Internal Medicine

    Dr. Portnay's Education & Training

    Medical School: Rosalind Franklin University/ Chicago Medical School; Graduated 1968

    Dr. Portnay'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. Portnay's Accepted Insurance

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

    • Aetna Choice POS II
    • Aetna HMO
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
    • BCBS Blue Card PPO
    • BCBS MA Blue Care Elect PPO
    • BCBS MA HMO Blue with Managed Care Behavioral Health
    • BCBS MA Preferred Blue PPO
    • CIGNA LocalPlus
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    Dr. Portnay's Office Information & Appointments

    Office Locations

    Harvard Vanguard Medical Associates
    Harvard Vanguard

    790 Boston Rd Ste 101
    Billerica, MA 01821
    (781) 505-8780


    Office Hours and Information

    Fax: (781) 505-8775

    Practice Website:

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: Yes

    Monday 8:00 AM - 5:00 PM
    Tuesday 8:00 AM - 5:00 PM
    Wednesday 8:00 AM - 5:00 PM
    Thursday 8:00 AM - 5:00 PM
    Friday 8:00 AM - 5:00 PM
    Saturday 8:30 AM - 12:00 PM
    Sunday Closed

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    Dr. Portnay's Hospital Affiliations

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