The United States has embarked on a major effort to achieve "meaningful use" of health information technology (HIT) by clinicians and hospitals. This paper, from The Commonwealth Fund's international program, describes meaningful use in three countries with very high levels of HIT adoption—Denmark, New Zealand, and Sweden. None has reached 100 percent in all meaningful use categories, but providers share many kinds of information with other health care organizations and health authorities. Less information is shared with patients. Useful strategies have included providing economic incentives to encourage adoption and designating an organization to take responsibility for standardization and interoperability.