Background Qualified and competent doctors in Indonesia has been produced for at least six years. At the end of their study they must be assessed by A High-Stakes National level examination called UKMPPD (Uji Kompetensi Mahasiswa Program Profesi Dokter) to assure national health quality services. There was many ways to enhance skills and OSCE UKMPPD passing score. One of effort from school of medicine UMY is using mentorship. This study was conducted to analize whether OSCE mentorship can be effective to pass on OSCE UKMPPD. Summary of Work This study used a pre-post experimental design with 153 participants who followed OSCE UKMPPD for period January-October 2017. Pre-test has been held 1 month before final exam with local comprehensive OSCE. The mentorship conducted in 1 month with 20 times departemental expert lectures, 40 times regulated independent learning OSCE and one time for formative simulated OSCE with direct feedback. OSCE UKMPPD result has been recorded as a post-test. Minimum requirement score for both of these test was more than 65. The data than analized using chi-square. Summary of Results There were significantly increased between pre and post test (p 78) successfully passed this exam with lower increase of pre and post result (0,52;0,73). Generally there was improvement in passing score between local comprehensive OSCE and OSCE UKMPPD which was 54% to 98%. Discussion & Conclusions Students must prepare for exams. This should include preparation countdown with key dates and preparation on finals. Therefore, School of Medicine UMY has conducted mentorship and the result showed that OSCE mentorship was effectively improves for passing on OSCE UKMPPD. A small discussion group, mentorship could bring motivational environment with constructive feedback and closely relationship between mentor and mentee. Take home messages You can try this method or combination of this.