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Gateway Medical Associates PC

Maria C. DeMario, DO
Map4667 West Chester Pike
Newtown Square, PA 19073


Maria DeMario, DO is a Board-certified Family Medicine physician with more than 20 years of experience caring for patients ranging from adolescents to seniors. As a 1991 graduate of Philadelphia College of Osteopathic Medicine, her philosophy of health care is rooted in the principle that the physical and emotional aspects of one’s health are integrated and are equally important in achieving true wellness. Her approach utilizes an evidence-based and multi-faceted model for optimizing health that is anchored by a unique doctor-patient relationship.

Dr. DeMario also volunteers her time to help safeguard the doctor-patient relationship, and protecting the medical profession. She is a past president of the Delaware County Medical Society, an active voting delegate of the Pennsylvania Medical Society, and was recently appointed to the Pennsylvania State Board of Osteopathic Medicine. She was also a 2013 delegate to the National Federation of State Boards.

Dr. DeMario resides with her husband, Bill, and their two daughters, Sarah and Rachel, in Delaware County.

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