Lewis Leng, MD: SFMS June 2014 Member of the Month Lewis Z. Leng, MD is a neurosurgeon at Pacific Neurosurgery and California Pacific Medical Center. Dr. Leng specializes in neuro-oncology, endoscopic pituitary and skull base tumor surgery, cerebrovascular surgery, and minimally invasive spine surgery. Dr. Leng has a special interest in treating pathologies of the brain and spine in a minimally invasive manner. July 3, 2014 Member of the Month, SFMS Member Lewis Leng, Member of the Month, SFMS Member 0 0 Comment Read More »