Department of Internal Medicine
Buffalo Medical Group, PC
Specialty: Internal Medicine

Dr. Matthew J. O’Brien joined the Buffalo Medical Group, PC in 1992, and is board certified by the American Board of Internal Medicine.

He earned his medical degree at the University at Buffalo (UB) School of Medicine and Biomedical Sciences, and completed his Internal Medicine specialty training at UB and hospitals affiliated with the university.

In addition to his Buffalo Medical Group practice, Dr. O’Brien has been a clinical assistant professor at UB for more than 20 years.

A former chair of the BMG Board of Directors, Dr. O’Brien is affiliated with Buffalo General Hospital.