Dr. John Joseph Obrien, MD

Dr. John Obrien specializes in family medicine, bringing over four decades of clinical expertise to patient care. He earned his medical degree from the University of Missouri Columbia School of Medicine and completed his residency training at St. Johns Medical Center. With 43 years of experience in practice, Dr. Obrien has developed comprehensive skills in primary care medicine. He provides care in English for patients and families throughout the community.

Dr. Obrien practices at multiple locations in O'Fallon and Saint Peters, Missouri, with hospital affiliations including Mercy Hospital Saint Louis and Barnes Jewish Saint Peters Hospital. His clinical focus includes treating seasonal allergies and rhinitis conditions that affect many patients. He offers allergen immunotherapy and sublingual immunotherapy treatments to help patients manage their allergic reactions effectively. Patients rate Dr. Obrien 4.7 out of 5 stars for his compassionate approach to family medicine care.