The increased use of health IT among providers could reduce the number of patients physicians are able to see, according to a study published in the American Journal of Managed Care. The study was based on survey responses from primary care physicians in Michigan. The survey -- by the Center for Healthcare Research & Transformation and the University of Michigan Child Health Evaluation and Research Unit -- was conducted between October 2012 and December 2012 and included a total of 739 respondents. The study found that physicians used a mean of 5.1 health IT services. The most commonly used health IT service was electronic prescribing, while a Web portal for patients to schedule appointments was the least common.