On April 27, HIMSS published its definitions of "meaningful use of certified EHR technologies" as outlined in the American Recovery and Reinvestment Act of 2009. HIMSS sent a cover letter, plus two definitions: 1) meaningful users of certified EHR technologies and 2) meaningful use for hospitals, to the National Coordinator of Health IT and the Acting CMS Commissioner, within the Department of Health and Human Services, according to a HIMSS release.