Abstract: The completeness of medical records is very important in the provision of health services, especially to improve the quality of service and patient safety. As an effort to improve the quality of service Muhammadiyah Hospital of Ponorogo has followed the KARS 2012 accreditation with a plenary achievement in August 2016. Although the status of accreditation plenary has been achieved but efforts to maintain improvements in patient care and patient safety should still be done. This study aims to determine the description of medical record completeness at Muhammadiyah Hospital of Ponorogo. This research is an observational analytic, quantitative approach with cross sectional design. Data analysis using univariate and bivariate analysis with Chi Square test. In the sample prior to the accreditation survey, the standard that was not achieved was PFE (Patient and Family Education) 2.1, while for samples after the accreditation survey, the unreachable standards were PFE 2.1, MCI (Management of Communication and Information) 19.3 and ACC (Acces to Care and Continuity of Care) 3.2.1. There are some standards that have statistically significant differences in the completeness of the medical record between before the accreditation survey and after the accreditation survey ie PFR (Patient and Family Right) 6.4 (p = 0.001), ASC (Anasthesia and Surgical Care) 7.1 (p = 0.018), AOP (Assesment of Patient) ( 1.6 (p = 0.020) , ASC 7.4 (p = 0.005), MCI 19.3 (P = 0.001).