Joseph P. O'Brien specializes in internal medicine. His expertise includes diabetes, high blood pressure (hypertension), heart disease, and geriatric medicine.

Dr. O'Brien has practiced with New Jersey Physicians since 2001. Before joining the group, he practiced with West Park Medical Group, a novel primary care mentorship program aligned with his residency, in New York City.

Dr. O'Brien has delivered local invited presentations for senior centers, affiliated hospitals, and the town of Clifton. He says, "I find the primary care of patients especially gratifying because because it requires that I have broad knowledge of medicine and draws on interpersonal skills that are essential in developing long-term, trusted professional relationships with patients."

Dr. O'Brien is a recipient of the MDx Medical, Inc, Most Compassionate Doctor Award and Patient's Choice Award.

When he is not working with his patients, Dr. O'Brien enjoys spending time with his wife and son as well as hiking, reading, and traveling. He particularly enjoys visiting New England, the Caribbean, and National Parks.