California lung cancer expert witnesses provide medical and scientific analysis on diagnosis, staging, and treatment decisions across the state. They often are thoracic oncologists, pulmonologists, radiologists, pathologists, and occupational medicine physicians from UCLA Health, UCSF Health, and major community cancer centers. In California, they frequently address risks tied to wildfire smoke and legacy asbestos exposure. They evaluate causation, screening adherence, imaging interpretation, pathology findings, and standard-of-care timelines.