Center for Studying Health System Change surveyed IT usage among US doctors. Obtaining treatment guidelines grew from 53% to 65%. Exchanging clinical data with other physicians grew from 41% to 50%. Accessing notes about patient care increased from 37% to 50%. Generating reminders grew from 24% to 29%. Writing prescriptions increased 11% to 22%. The number of physicians who reported limited access to IT, defined as one or none of the assessed technologies, dropped from 51% to 37%.