The integrated cards allow medical institutions to view the cardholder's data, including medication prescription records and health checkups, and offer patients appropriate treatment options, the government says. But the My Number ID system has become unpopular among the public following revelations of personal information leaks and registration errors, with some calling for health insurance certificates' phasing out to be postponed, or for the plan to be rolled back. In the survey, conducted between July and September this year, only 29.6 percent of the 892 hospitals that have installed the new system for utilizing the cards said they are using it to view patients' health data, with consent, while 68.2 percent said they are not using the system.