1. Electronic prescribing of controlled substances among office-based physicians: 2017-2019 Author(s): Johnson, Christian, (Of the Office of the National Coordinator for Health Information Technology), authorEstrada, Michelle, author Publication: Washington, DC : Office of the National Coordinator for Health Information Technology, June 2022 Subject(s): Controlled SubstancesElectronic Prescribing -- statistics & numerical dataUnited States