Dr. Steven B Ernst specializes in emergency medicine in Upland area. Dr. Steven B Ernst, MD has a medical practice at 999 San Bernardino Road, Upland CA, and has over 30 years of experience in the field of medicine. He graduated from University Of California, Irvine, California College Of Medicine with his medical degree in 1987. He is affiliated with numerous hospitals, including San Antonio Regional Hospital (CA) and more. Dr. Ernst is accepting new patients at his medical office and practice location in Upland, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.