Lall grew up in Wisconsin before attending Johns Hopkins University, in Baltimore, MD. He then attended medical school at the University of Chicago, where he developed an interest in Neurosurgery. He did residency at Northwestern University, where he developed sub-specialty interests in brain tumors, minimally invasive spine, and complex/revision spine surgery. Then he did a fellowship at the New York Head and Neck Institute focused on endoscopic skull base surgery and minimally invasive surgery for brain tumors. He returned to area to join the Neurosurgery team at Fairview, where his practice focuses on brain tumors and spine surgery.