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  • Jannette H. Negron, MD

    Pediatric Medicine 407.635.3020 Hours of Operation Monday: 7:00am - 4:00pm Tuesday: 9:00am - 6:00pm Wednesday: 7:00am - 4:00pm Thursday: 9:00am - 6

  • Jay Ashok Vachhani, MD

    Dr. Jay Vachhan is a board-certified neurosurgeon with Orlando Health Neuroscience Institute. He is a fellow of the American Association of Neurological Surgeons and a member of the Congress of Neurological Surgeons.

  • Jacqueline E. Hamilton, MD

    Jacqueline Hamilton, MD, joined Orlando Health Medical Group in 2009. She is board certified in urology and has been practicing in the Orlando area since 1998.

  • Jennifer A Villar, MD

    Jennifer A. Villar, MD, is board certified by the American Board of Pediatrics and serves at Orlando Health Arnold Palmer Hospital for Children Endocrinology and Diabetes Center. Her clinical interests include short stature, early puberty and obesity.

  • Jennifer K. Logan, MD

    Dr. Jennifer Logan is a board-certified radiation oncologist with the Center for Advanced Radiation Therapy at the Orlando Health Cancer Institute. She specializes in radiation therapy to treat patients at all stages of cancer, with advanced training in treatments including proton therapy, MRI-guided adaptive radiation, HDR and LDR gynecologic brachytherapy, stereotactic body radiation therapy and radioembolization.

  • Jennifer S. Thielhelm, MD

    Jennifer Thielhelm, MD, is a board-certified pediatrician with Orlando Health Physician Associates. Dr. Thielhelm specializes in providing comprehensive care — from the assessment of childhood development to the treatment of common and complex illnesses — for newborns, children and adolescents through college.

  • Jennifer E. Tseng, MD

    Jennifer Tseng, MD, hematologist/medical oncologist, is the Thoracic/Head and Neck Specialty Section leader for Medical Oncology and the associate director of Clinical Research for Medical Oncology at Orlando Health Cancer Institute.

    Dr. Tseng received her medical degree from Duke University School of Medicine. She completed her residency and served as assistant chief resident in internal medicine at Duke University Medical Center. She completed a fellowship in medical oncology and hematology at The University of Texas MD Anderson Cancer Center in Houston. She is board-certified in internal medicine and medical oncology and board-eligible in hematology. Dr. Tseng has received several honors and awards, including the C.D. Howe Award for clinical excellence in medical oncology and a Clinical Research Award from MD Anderson, the American Medical Women's Award, Hewlett Packard Award, the Alpha Omega Alpha Research Symposium Award from Duke University and a Beneficial-Hodgson scholarship from The Johns Hopkins University. She was also awarded Attending of the Year from the Internal Medicine Residency Program from Orlando Regional Medical Center and received the Exemplary Physician Colleague Award from Orlando Health in 2009.

    In addition to her clinical studies, Dr. Tseng has published research on various topics including molecular alterations in lung cancer and novel agents in the treatment of head and neck cancer. She has recently presented at the Annual Thoracic Oncology Symposium of the Puerto Rican Society of Hematology Oncology and spoke on neoadjuvant and adjuvant treatment strategies in lung cancer.

  • Jean Siri Moorjani, MD

    Jeannie S. Moorjani, MD, FAAP, is a board-certified pediatrician at Orlando Health Arnold Palmer Hospital for Children. She is a member of the medical education faculty that works with the pediatric residency training program. Her areas of focus include breastfeeding, asthma and children with special healthcare needs.

  • Jeffrey A. Carr, MD

    Jeffrey Carr, MD, is a board-certified family medicine physician in practice with Orlando Health Physician Associates. Dr. Carr specializes in comprehensive care for patients of all ages, providing preventive care as well as management of complex and chronic conditions.

  • Jeffrey Richard Smith, MD

    Jeffrey Smith, MD, MHS, FACS, is a surgeon with the Breast Care and Melanoma/Sarcoma Centers at Orlando Health Cancer Institute and is certified by the American Board of Surgery. He works with patients to create a personalized treatment plan and provide the latest, evidence-based approach for each patient’s specific type and stage of cancer.