The Lewin Group is the Consulting business unit within OptumServe, the federal health services business of Optum and UnitedHe ... alth Group. We provide health care and human services policy, analytics and consulting, with more than 50 years of research experience and a focus on relationships. Learn more about how we can help governments and communities tackle some of the biggest challenges in health care, and improve the health and well-being of those we collectively serve. read more