Dr. Leonard Mark Oestreicher specializes in family practice in Merced area. Dr. Leonard Mark Oestreicher, MD has a medical practice at 374 West Olive Avenue, Suite B, Merced CA, and has over 43 years of experience in the field of medicine. He graduated from University Of California, San Francisco School Of Medicine with his medical degree in 1974. He is affiliated with numerous hospitals, including Mercy Medical Center (CA) and more. Dr. Oestreicher is accepting new patients at his medical office and practice location in Merced, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.