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Dr. O'brien is licensed to practice medicine in the state of Connecticut.
Specializing in the field of Gastroenterology, Dr. O'brien is prepared to diagnose and treat patients suffering from diseases and complications of the gastrointestinal (digestive) tract, treating conditions such as irritable bowel syndrome or gastroesophageal reflux disease, among many others.
Dr. O'brien works with one doctor, Dr. Peter Buch.
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