Sonja Wollin Schratter specializes in clinical social worker in Walnut Creek area. Sonja Wollin Schratter, CSW has a medical practice at 3000 Citrus Circle, Ste 112, Walnut Creek CA, and has over 50 years of experience in the field of medicine. She graduated from her medical school with her medical degree in 1967. Schratter is accepting new patients at her medical office and practice location in Walnut Creek, California.