Your endocrine system involves the glands within your body and the hormones they produce. This includes the pituitary, thyroid, adrenal glands, ovaries, testes, and pancreas. A disorder or imbalance in the endocrine system can have impacts on your entire body.

Conditions We Treat:

Our Endocrinology team treats a wide range of disorders including the following:

  • Diabetes: We treat Type 1 and Type 2 diabetes by encouraging lifestyle changes and providing appropriate medications and treatments.
  • Thyroid Disease and Disorders: These include hyperthyroidism, Hashimoto’s Disease, hypothyroidism, thyroid nodules, and thyroid cancer.
  • Obesity: For patients struggling with obesity, we can help with weight loss.
  • Calcium Abnormalities: These include osteoporosis, and disorders of anomalies.
  • Polycystic Ovary Syndrome: The parathyroid gland disorder is caused by an imbalance of reproductive hormones and results in infrequent or prolonged menstrual periods.
  • Additional Gland Disorders: These include diseases and abnormalities in the pituitary, adrenal, and reproductive glands.

In Office Procedures

We provide the following services in our offices:

  • Onsite thyroid ultrasonography
  • Ultrasound-guided fine-needle aspiration of the thyroid
  • Outpatient and inpatient endocrinology consultations

Meet the Team

  • Ishita Kharode, MD

    Dr. Kharode is a pediatric endocrinologist at Richmond University Medical Center (RUMC). She sees patients with a variety of endocrine-related conditions, including Type 1 and Type 2 diabetes, short stature, obesity, polycystic ovary syndrome, and thyroid disorders.

    Dr. Kharode received her medical school degree at St. George’s University, Grenada, West Indies. She completed her pediatric residency at SUNY Upstate Medical University/Upstate Golisano Children’s Hospital and her pediatric endocrinology fellowship at New York – Presbyterian Hospital/ Weill Cornell Medical Center.

    Dr. Kharode is board certified in both general pediatrics and pediatric endocrinology. She is fluent in English and Gujarati and speaks Spanish at a professional working proficiency level.

  • Miroslawa Kudej, MD

    Dr. Kudej is board certified in endocrinology, diabetes and metabolism and treats all endocrine conditions with special interests in thyroid disorders, parathyroid disorders, and PCO, diabetes and weight problems.

    Dr. Kudej completed her three years of residency in internal medicine followed by two years of fellowship in endocrinology at Interfaith Medical Center in Brooklyn. Prior to joining the Richmond Health Network in 2008, Dr. Kudej worked for years in private practice in Brooklyn.

    Dr. Kudej has more than 26 years of experience in the field of endocrinology and is proud to say that she has been serving the Staten Island community for more than 20 years.

  • Lina Leykina, MD

    Dr. Leykina, an endocrinologist at Richmond University Medical Center (RUMC), obtained her bachelor’s degree from Wagner College, Staten Island, NY. She then earned a doctor of medicine degree from Ross University School of Medicine. Dr. Leykina completed her residency in internal medicine and her fellowship training in endocrinology, diabetes and metabolism at Albany Medical Center, NY. She is board certified in internal medicine, diabetes, endocrinology, and metabolism.

    Dr. Leykina sees hospitalized patients for consultation in addition to working at the outpatient division of RUMC

  • Dr. Tun’s journey in medicine began with her Medical degree from the Institute of Medicine 1, Yangon, Myanmar. She completed a Master’s in Clinical Tropical Medicine at Mahidol University, and subsequently her second Master’s degree in Diabetes Care and Management at Glasgow Caledonian University. She held positions as Senior House Officer in the NHS hospitals in the UK. While working in the UK, she attained MRCP from the Royal College of Physicians. During her internal medicine residency at Richmond University Medical Center, she served as a third-year Chief Resident. She pursued her fellowship training in endocrinology at the SUNY Downstate Medical Center in Brooklyn, NY. She held a position as an Attending Faculty in the Endocrinology Fellowship program in South Brooklyn Health before she joins back to the RUMC. Dr Tun is recently elected as FRCP by the Royal College of Physicians, UK. She is board certified in Endocrinology, Diabetes and Metabolism, and Internal Medicine. 

  • Philip E. Otterbeck, MD

    Dr. Otterbeck graduated from New York University cum laude with a bachelor’s degree in biology and a minor in Russian and Slavic Studies. He earned a doctor of medicine degree from SUNY Downstate Medical Center in Brooklyn, NY, where he also completed a residency in internal medicine and a fellowship in diabetes, endocrinology, and metabolism. Dr. Otterbeck is a clinical assistant professor of medicine at SUNY Downstate Medical Center and an adjunct assistant professor of medicine at both the Icahn School of Medicine at Mt. Sinai and New York Medical College.  Most recently, in the summer of 2021, he completed an MBA in health services administration at SUNY Oswego.

    In addition to maintaining a busy endocrine practice at RUMC, he has served as vice president of the medical staff, the chair of the Credentials Committee, and as a member of the Medical Executive Committee.  He has been a member of the Richmond University Medical Center Foundation Board of Trustees since 2013.

    A native Staten Islander, Dr. Otterbeck has received numerous awards for community service and serves on the foundation boards of the Eden II and Genesis Foundation and the Brooklyn Home for the Aged.  A popular lecturer, he has published numerous peer-reviewed articles in the areas of diabetes, obesity, and vitamin D metabolism.

    He resides on Staten Island with his wife Victoria and their children Ava Grace and Philip Thomas.

  • Mark Sheynshteyn, DO

    Dr. Sheynshteyn is an endocrinologist at Richmond University Medical Center (RUMC), board certified in internal medicine and endocrinology. He graduated from Hunter College cum laude with bachelor’s degree in biochemistry and art history.

    After taking time to travel and search for the best way to continue his education, he discovered the osteopathic approach to medicine. In this approach, the body is treated as a whole and treatment is based upon understanding the relationship between structure, function, and the body’s ability to self-regulate and heal.

    He enrolled in the New York Institute of Technology College of Osteopathic Medicine to pursue a career in medicine and further explore this philosophy. After graduating medical school, he completed his residency training in the New York Presbyterian Hospital system. He stayed on, as faculty, in the New York Presbyterian system, working in acute inpatient settings. He then pursued further training in endocrinology, diabetes, and metabolism, completing his fellowship.

    Dr. Sheynshteyn is passionate about his work. He believes in an integrative approach to medicine, in the ability to listen and provide appropriate treatment, and in supporting and providing education to his patients.