Frances L Onderwyzer specializes in clinical social worker in Newbury Park area. Frances L Onderwyzer, CSW has a medical practice at 1000 Newbury Road, Ste. 240, Newbury Park CA, and has over 30 years of experience in the field of medicine. She graduated from her medical school with her medical degree in 1987. Onderwyzer is accepting new patients at her medical office and practice location in Newbury Park, California.