He received post-graduate oral medicine training at Walter Reed Army Medical Center in Washington, DC. After leaving the service, he remained in the nation’s capital, where he was a founding partner in an eleven doctor dental office.
He practiced in New York City before moving to the Hudson Valley where he has practiced since 2002. He has also acquired his certification in Medical Acupuncture for Physicians from the Helms Institute at UCLA’s David Geffen School of Medicine in Los Angeles. Dr. Oppenheimer is an American Dental Association member, a member of the New York State Dental Association and the 3rd District Dental Society.