Apr 10, 2015 · According to the survey — commissioned by eClinicalWorks and conducted online by Harris Poll among over 2,000 U.S. adults — in March 2015, 84 percent of people say their doctor's offices have a patient portal. Of those whose doctors do have a patient portal, adults age 55+ (61 percent) are more likely to access their health information via this tool than adults age ….