WORCESTER, Mass.As important as the specific incentives to providers have been, the electric shock that the meaningful use legislation has delivered to the IT market as a whole [has changed the market], stated David Blumenthal, MD, Samuel O. Thier Professor of Medicine and professor of health policy at Harvard Medical School in Boston. There are currently about 700 certified EHR products and applications modules, said Blumenthal, former National Coordinator of Health IT, during his keynote address at the Massachusetts Governors 2011 Health IT Conference May 9.