Ann Elizab Mason specializes in clinical social worker in San Mateo area. Ann Elizab Mason, CSW has a medical practice at 1777 Borel Place, Suite 425, San Mateo CA, and has over 39 years of experience in the field of medicine. She graduated from her medical school with her medical degree in 1978. Mason is accepting new patients at her medical office and practice location in San Mateo, California.