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  • Adult Medicine

  • Adult Medicine

    Manage your health and optimize your wellbeing with the support of the Adult Medicine Department. All patients 18 years and older receive the full benefit of preventive health programs, acute care, and medical illness management.

    Treadmill and 24- and 48-hour Holter monitoring (for heart) testing are just two of the many tools that are readily available for the early detection and diagnosis of medical conditions. All are provided and administered by our highly credentialed medical staff (or providers). This consists of an internist, family practice physicians, certified physician assistants, registered nurses, and licensed practical nurses.

    Professional Staff

    Vincent Duenas

    Vincent "Vinnie" Duenas, D.O.

    Vincent Steven Duenas is AOA Board Certified in Internal Medicine. He completed his residency at Midwestern University Osteopathic Postdoctoral Training Institution (Sierra Vista Regional Health Center) in Arizona.

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    Helene Duenas

    Helene Duenas-Tuncap, PA-C

    Helene Duenas is a U.S. Board Certified Physician Assistant.

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    Marylou A. Dulay, M.D.

    Marylou Dulay is a U.S. Board Certified Internal Medicine Physician who has practiced at Kaiser Permanente, the UCLA Medical Center and Concentra Medical Centers in Los Angeles, California.  She has received numerous awards including the Physician Performance Award and an honorable mention in Best Residency Teaching.

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    Karyn Kaufman

    Karyn Kaufman, PA-C

    Karyn Kaufman is a US Board Certified Physician Assistant who has practiced at the FHP Health Center for over thirty years.

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    Luella Marie Manlucu, M.D.

    Dr. Manlucu is a U.S. Board Certified Family Medicine Physician. She is a recipient of the Leonard Tow Humanism in Medicine Award.


    Lina Quan-Aston, M.D.

    Urgent Care

    Lina Quan-Aston is a physician assistant specializing in adult medicine.


    Lilybeth Sistoza

    Lilybeth Sistoza, M.D.

    Lilybeth Sistoza is a US trained Internal Medicine physician that has served as the attending Physician in medical centers and hospitals in California and Missouri

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    Wally Straton

    Walter "Wally" Stratton, PA-C

    Walter Stratton is U.S. Board Certified Physician Assistant with over thirty years experience in the medical profession. He specializes in occupational medicine, family practice and adult medicine and has been practicing in Guam for over 22 years.

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    Edwin Supit

    Edwin Supit, M.D.

    Edwin Supit is a US trained Physician and specializes in health and wellness medicine and practices.

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    Business Hours:
    Monday - Friday 9 a.m. – 6 p.m.

    Contact Information: (671) 646-5825

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