John E. Wennberg

John E. Wennberg is a pioneer in healthcare research known for studying how medical care varies across different regions and patients. He examined why some areas receive more treatments or tests than others, often with little benefit. His work highlights the importance of personalized, evidence-based medicine and has influenced efforts to improve healthcare quality, reduce unnecessary procedures, and promote more consistent, cost-effective care. Wennberg’s insights have helped shape policies aimed at ensuring patients receive appropriate and tailored medical treatment.