David Marshak, graduated from University Of California, Irvine, California College Of Medicine in 1992. His primary practice is as an Anesthesiology: Pain Medicine, also practicing as an Independent Medical Examiner, an Anesthesiology: Hospice and Palliative Medicine, an Anesthesiology: Pain Medicine, a General Practice, a Pain Medicine: Pain Medicine, a Pain Medicine: Interventional Pain Medicine, and an Anesthesiology.