With an aging population and millions potentially gaining health insurance coverage for the first time, demand for health care services is likely to soar in coming years. A new Health Affairs study by Jonathan P. Weiner and Susan Yeh of the Johns Hopkins Bloomberg School of Public Health and David Blumenthal of The Commonwealth Fund finds that health information technology will substantially lessen the burden on primary care physicians through gains in efficiency, greater reliance on nurse practitioners and physician assistants, and greater emphasis on remotely provided care.