The initial 1992 Diabetes Quality Assurance (DQA) Checklist was developed as a tool to facilitate chart auditing for evaluating clinician adherence to the current quality-of-care standards. This article describes how the authors revised and updated the 1992 DQA Checklist to incorporate more recent evidence related to clinical interventions that improve outcome. The revised version is designed to address the 2005 American Diabetes Association Standards for Medical Care. Additional changes were made to facilitate the review process. The revised instrument has been named the Revised 2005 Diabetes Quality Improvement (DQI) Checklist to reflect the emphasis on its potential use in quality improvement activities. The 2005 DQI Checklist is an updated version of the original 1992 DQA Checklist, with additional modifications based on the 2005 American Diabetes Association Standards of Medical Care, the National Cholesterol Education Program Adult Treatment Panel III, the Seventh Joint National Committee on the Prevention, Detection and Treatment of High Blood Pressure Guidelines, and the Centers for Disease Control and Prevention Adult Immunizations Guidelines.