The electronic health record market grew to $15.7 billion in 2010, according to a new report by Kalorama Information, Healthcare IT News reports. The report found that the EHR market experienced a growth rate of 10 percent in 2009 and 13.6 percent in 2010, falling short of Kalorama’s projections of a 15 percent growth rate for both years. Researchers noted that the lower-than-expected growth rate could be related to confusion about EHR certification and meaningful use guidelines. The report notes that physician usage of EHRs is at nearly 50 percent, with EHR adoption and upgrades expected to accelerate in the coming years. As a result, Kalorama predicts the EHR market will experience a growth rate of more than 18 percent over the next two years.