Newswise — Montclair, NJ - (January 13, 2021) – Mountainside Medical Group announced today that Rosemarie Arena, M.D., has joined the practice, expanding their gastroenterology group.

Rosemarie Arena, M.D., is board certified in Internal Medicine and specializes in Gastroenterology. Dr. Arena values getting to know her patients as people first and foremost. “Taking the time to listen to the patient’s chief complaint, along with medical and personal history can help me tremendously improve a patient’s quality of life.”

Dr. Arena’s specific areas of interest include inflammatory bowel disease (Crohn’s disease and ulcerative colitis) and liver disease. “There are so many factors that can contribute to gastrointestinal disorders’, she says. “I like to keep an open dialogue with my patients about their diagnosis, tests and treatment options each step of the way.”

“We are pleased to have Dr. Rosemarie Arena join Mountainside Medical Group,” says Tim O’Brien, Chief Executive Officer. “It is important that we expand our physician network with those who have a well-rounded approach to medicine and are able to treat and care for patients by personalizing treatment options.”

Dr. Rosemarie Arena received her medical degree, completed her residency and fellowship at Drexel University College of Medicine.

Her personal interests include, cooking, baking, figure skating, and spending time with friends and family.

Dr. Arena will see patients in the Mountainside Medical Office Building located at 311 Bay Avenue, Suite 300, in Glen Ridge, NJ. New patients are welcome and may visit to request an appointment or call 973-798-4777.

About Hackensack Meridian Health Mountainside Medical Group

The Mountainside Medical Group is a network of physicians specializing in internal medicine, family medicine, OB/GYN, endocrinology, pulmonology, gastroenterology, and plastic surgery created by Mountainside Medical Center, now part of Hackensack Meridian Health. We believe people who establish a personal relationship with their doctors experience better health and quality of life. Start well and stay well with Mountainside Medical Group. Offices are located in Montclair, Bloomfield, Caldwell, Glen Ridge, Nutley, Union, Verona, West Caldwell, and Woodland Park. For more information, visit:

About Hackensack Meridian Health Mountainside Medical Center

Hackensack Meridian Health Mountainside Medical Center has been serving Montclair and its surrounding New Jersey communities since 1891. The hospital provides patients access to innovative and effective treatment in specialized centers within the hospital focused on radiology, women’s health, oncology, surgery, bariatrics, neurosciences, stroke, and cardiovascular services. Mountainside is designated as a Primary Stroke Center by The Joint Commission and The NJ State Department of Health and Senior Services and is one of only a few community hospitals licensed by the State to perform emergency cardiac angioplasty and emergency neuroendovascular procedures. To learn more about Hackensack Meridian Health Mountainside Medical Center visit