BackgroundAppropriately documented medical records enhance coordination, patient outcomes and clinical research.ObjectiveThe aim of this project was to improve Wallaga University Referral Hospital’s (WURH) medical record completeness rate from 53% to 80% from 1 January 2023 to 31 August 2023.MethodsA hospital-based interventional study was conducted at WURH. The Plan-Do-Study-Act cycle was used to test change ideas. A fishbone diagram and a driver diagram were used to identify root causes and address them. Key interventions consisted of supportive supervision, developing and distributing standardised formats, orientation for staff, establishing a chart audit team and assigning data owners.ResultOn the completion of the project, the overall implementation of inpatient medical record completeness increased from 53% to 82%. This improvement varies from department-to-department. It increased from 51% to 79%, 53% to 79%, 46% to 81% and 64% to 91% in the departments of internal medicine, paediatrics, obstetrics and gynaecology and surgery, respectively. The project brought improvements in the completeness of physician notes (84% to 100%), physician order sheet (54% to 84%), nursing care plan (26% to 69%), admission sheet (76% to 98%), discharge summary (94% to 98%), progress note (38% to 91%), medication administration (80% to 100%), appropriate attachment of documents (78% to 93%) and documentation of vital signs (50% to 100%).Conclusion and recommendationThe rate of medical record completeness was significantly improved in the study area. This was achieved through the application of multidimensional change ideas related to health professionals, supplies, health management information systems and leadership. However, in some of the parameters, the national targets were not met. Therefore, we recommend providing regular technical updates, conducting frequent chart audits and providing supportive supervision for the enhancement of medical record completeness. It is also advisable for the hospital management to work on its sustainability.