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    Ralph A. Defronzo, MD

    Endocrinology, Diabetes & Metabolism, Diabetes

    Dr. Defronzo's Overview

    Dr. Defronzo graduated from the Harvard Medical School in 1969. He works in San Antonio, TX and specializes in Endocrinology, Diabetes & Metabolism and Diabetes. Dr. Defronzo is affiliated with University Hospital.

    Dr. Defronzo's Experience

    Years in Practice: 48

    Dr. Defronzo's Specialties

    Endocrinology, Diabetes & Metabolism, Diabetes

    Dr. Defronzo's Education & Training

    Medical School: Harvard Medical School; Graduated 1969

    Dr. Defronzo'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. Defronzo'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 TX Blue Advantage HMO
    • BCBS TX BlueChoice
    • Humana Choice POS
    • Humana ChoiceCare Network PPO
    • Humana HMO Premier
    • View More

    Dr. Defronzo's Office Information & Appointments

    Office Locations

    University Of Texas Health Science Center Anesthesia

    7703 Floyd Curl Dr
    San Antonio, TX 78229
    (210) 567-4500


    Office Hours and Information

    Fax: (210) 567-4522

    Practice Website: Not Available

    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 Closed
    Sunday Closed

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    Dr. Defronzo's Hospital Affiliations

    Office Locations