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    Dr. John A. Ostuni, MD

    Internal Medicine, Endocrinology, Diabetes & Metabolism

    • (516) 379-3139

    Dr. Ostuni's Overview

    Dr. Ostuni graduated from the SUNY Downstate Medical Center College of Medicine in 1971. He works in Freeport, NY and specializes in Internal Medicine and Endocrinology, Diabetes & Metabolism. Dr. Ostuni is affiliated with South Nassau Communities Hospital.

    Dr. Ostuni's Experience

    Years in Practice: 45

    Dr. Ostuni's Specialties

    Internal Medicine, Endocrinology, Diabetes & Metabolism

    Dr. Ostuni's Education & Training

    Medical School: SUNY Downstate Medical Center College of Medicine; Graduated 1971

    Dr. Ostuni's Rating

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    Overall Rating


    • Explains conditions & treatments
    • Takes time to answer my questions
    • Provides follow-up as needed
    • View All Ratings

    Dr. Ostuni's Accepted Insurance

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

    • Aetna Choice POS II
    • Aetna Choice POS Open Access
    • Aetna Elect Choice EPO
    • Aetna HMO
    • Aetna Managed Choice POS Open Access
    • Aetna NY Silver 20 Dollar Copay EPO NY Signature PD
    • Aetna Select
    • Aetna Signature Administrators PPO
    • BCBS Blue Card PPO
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    Dr. Ostuni's Office Information & Appointments

    Office Locations

    South Nassau Internal Medcn
    South Nassau Internal Medicine Associates

    155 W Merrick Rd Ste 101
    Freeport, NY 11520
    (516) 379-3139


    Office Hours and Information

    Fax: (516) 868-0683

    Practice Website: Not Available

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: Yes

    Monday 9:00 AM - 5:00 PM
    Tuesday 9:00 AM - 5:00 PM
    Wednesday 9:00 AM - 12:00 PM
    Thursday 9:00 AM - 5:00 PM
    Friday 9:00 AM - 5:00 PM
    Saturday 9:00 AM - 12:00 PM
    Sunday Closed

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    Dr. Ostuni's Hospital Affiliations

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