Electronic health records (EHRs) have experienced slow adoption rates but play an important role in improving ambulatory quality of care. Sustained use of EHRs is closely related to physician satisfaction, however little research exists on this issue. We focused on physician EHR users to determine factors that are related to satisfaction with the level of computerization in their office practice. After controlling for various factors, physicians with more robust EHRs, and those who adopted their system two or more years ago, were more likely to be satisfied. Lastly, several individual EHR functionalities were independently related to improved satisfaction.