Jeffrey R Abergel, MD

Dr. Michael Christensen, MD, is board-certified in Internal Medicine, and is an Assistant Clinical Professor of Medicine at Columbia University Medical Center. Dr. Christensen received his undergraduate education at the University of Notre Dame, and his medical training at the University of Monterrey and the Mount Sinai School of Medicine. After his internship, residency, and chief residency at Mount Sinai Hospital Services at Elmhurst City Hospital Queens, he stayed on in a faculty position in the Primary Care Residency Program. He was also appointed Medical Director of the hospital's diagnostic clinic, where care was provided to hundreds of patients daily from one of the most diverse communities in New York City. Dr. Christensen has been caring for his patients for more than 20 years. He received the "Excellence in Education Award" from the Undergraduate Medical Education and Primary Care at New York Medical College during his time of preceptorship. Dr. Christensen is fluent in Spanish and is a member of the American College of Physicians.

Ellen grew up in Queens, New York, received my BA at Barnard College, MA at The Institute of Human Nutrition at Columbia P&S, and MD at the University of Miami School of Medicine. I returned to New York for my Pediatric Residency at Schneider Children's Hospital at LIJMC. I became a Pediatrician and learned to love grits down in rural Arkansas, then back to NY to spend five years at a local Hudson Valley Health center where I met Larry Baskind and Mary Ellen Stavitz. I have continued to work with them over the past 15 years (minus a sabbatical to enjoy the teenage years with my two lovely daughters), and I am honored to join them and the rest of the awesome staff down in Croton, providing for children and their families. I enjoy everything else life has to offer with my family and black lab, Violet.In our pediatric practices, we advocate for children to receive the recommended vaccinations as per the schedules provided by the American Academy of Pediatrics and the Centers for Disease Control and Prevention. Vaccines are a safe and effective means of preventing diseases and health complications in children and young adults.If you have any questions or concerns regarding vaccinations, we are available to discuss them during your child's next visit.Vaccine Schedule: https://www.cdc.gov/vaccines/hcp/imz-schedules/child-adolescent-age.htmlResources:https://www.aap.org/en/work-in-progress/immunizations/how-vaccines-work/

Dr. Mark T. Langhans is a second-generation fellowship-trained orthopedic surgeon specializing in sports related injuries of both athletes and non-athletes alike at New York Presbyterian Hudson Valley. He is also an Assistant Professor of Orthopedic Surgery at Columbia University Irving Medical Center. Dr. Langhans completed his undergraduate work at the University of Notre Dame where he graduated with a degree in biochemistry with honors. He was awarded a National Institutes of Health training grant to the University of Pittsburgh Medical Scientist Training Program where he completed a PhD in molecular genetics and developmental biology in a the Center for Cellular and Molecular Engineering in addition to his MD. He was elected to the Alpha Omega Alpha Honor Medical Society for his clinical excellence in medical school. His orthopedic surgery residency was completed at the Hospital for Special Surgery followed by a sports medicine and shoulder fellowship at the Mayo Clinic in Rochester, MN. In addition to his training in the United States, Dr. Langhans has also trained with European experts in shoulder surgery at the Institute de Chirugie Reparatrice (Nice, France). Dr. Langhans has extensive experience caring for athletes of all levels from high school and college to professional and weekend warrior. At the Mayo Clinic, he served as an assistant team physician for the Minnesota Timberwolves (NBA) and the Minnesota Twins (MLB). Additionally, he served as head team physician for the Austin Bruins (NAHL) and the Rochester Grizzlies (NA3HL). His clinical and research interests are focused on the development of personalized medicine approaches for orthopedic conditions. To this end, he offers a full spectrum of orthopedic care that includes cellular therapy, biologics, joint preservation techniques, minimally invasive arthroscopic techniques, and joint replacement. He has presented his research at national and international meetings. He serves as a peer reviewer for the American Journal of Sports Medicine. He is a member of the American Association of Orthopedic Surgeons (AAOS), the American Orthopaedic Society for Sports Medicine (AOSSM), the Orthopedic Research Society (ORS), and the Arthroscopy Association of North America (AANA).