In his practice, he is particularly interested in comprehensive ophthalmology. Dr. Contreras accepts several insurance carriers, including Anthem, Blue Cross/Blue Shield, and Aetna. He studied medicine at the University of California, Los Angeles (UCLA), David Geffen School of Medicine. Dr. Contreras's residency was performed at Ochsner Medical Center, St. Mary's Hospital, and a hospital affiliated with the University of California, Irvine. He speaks Spanish. He is affiliated with O'Connor Hospital and Regional Medical Center of San Jose.