Mark L. de Fazio, MD


A Fellow of the American College of Obstetrics & Gynecology and a Diplomate of the American Board of Obstetrics & Gynecology, Dr. Mark de Fazio is a Phi Beta Kappa, Cum Laude graduate of Holy Cross College in Massachusetts. He received his Doctorate in Medicine from SUNY Downstate Medical Center and completed his residency in Obstetrics & Gynecology at the Brookdale Hospital Medical Center in Brooklyn, New York, where he was Administrative Chief Resident in his final year.

Dr. Mark de Fazio joined his father Dr. Laurence de Fazio in practice in 1990. He is an Attending Physician at the New York Presbyterian Brooklyn Methodist Hospital in Park Slope, Brooklyn and an Assistant Clinical Professor of Obstetrics & Gynecology at the Weill Cornell Medical College of Cornell University. He is fluent in Italian.

At Brooklyn Methodist Hospital, “Dr. Mark” is closely involved with the supervision and education of residents and medical students, where he gives them lectures throughout the year. He has also served as a member of the hospital’s Bylaws Committee, Credentials Committee and the Continuing Education Committee. In addition, in 2020 he was elected President of the Medical Board after having served as the Board’s Secretary Treasurer and Vice President in the prior four years.

Dr. Mark de Fazio has been a medical consultant and has been on the credentials committee for several medical insurance companies. He is and has been a medical consultant for various pharmaceutical and medical device corporations. He has lectured across the country on topics such as the benefits of omega-3 fatty acids in pregnancy, the treatment of nausea and vomiting in pregnancy, and estrogen replacement therapy in menopause. Dr. Mark de Fazio is a past President of the Morgagni Medical Society of New York and currently a member of the Society’s Board of Trustees. He is also a member of the Brooklyn Gynecological Society, the Medical Society of the State of New York and the American Medical Association.

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