Dr. Joel Beryl Loewenstein, MD

Dr. Joel Loewenstein is a gastroenterologist and internal medicine physician with more than five decades of clinical experience. He earned his medical degree from SUNY Downstate Medical Center College of Medicine and completed his residency training through the U.S. Department of Veterans Affairs. With 55 years of practice, Dr. Loewenstein brings extensive expertise to digestive health and comprehensive internal medicine care. He is fluent in both Spanish and English.

Dr. Loewenstein practices at Mount Sinai South Nassau and Mercy Medical Center, with locations in Oceanside and Long Beach, New York. His clinical focus includes treating GERD and esophagitis, along with evaluating abdominal pain. He performs diagnostic procedures such as gastrointestinal imaging studies and abdominal ultrasounds to help identify digestive concerns. Patients have given Dr. Loewenstein an average rating of 4.6 out of 5 stars.