e19166 Background: Measuring quality in cancer care is a complex process due to the heterogeneity of the medical information and the biological complexity of the disease. There are different tools designed for this purpose, including the ASCO QOPI scale that includes core and specific dimensions for some types of cancer. In Colombia there is no specific quality tools in cancer for the evaluation of providers. Methods: This is an observational study. We designed and applied an oncology quality evaluation tool based in the SCO QOPI scale, but adapted to regional language and available technologies. This tool was based on six dimensions, each one weighted according to its relevance in the quality of cancer care (percentage in parentheses): Patient identification (5), oncologic history (25), physical exam (5), diagnostic tests (20), treatment plan (40) and readability (5).The tool was applied to four diseases: Breast cancer, colon cancer, non-small cell lung cancer (NSCLC) and multiple myeloma. 706 clinical cases were evaluated from 10 hospitals, both general and oncological. After evaluating each case, 171 met with the criteria, however, only 110 had complete clinical records. Four auditor physicians were trained by a clinical expert for each disease. Results: The distribution of cases by disease was: Breast cancer 51%, colon cancer 17%, multiple myeloma 22% and NSCLC 10%. Overall result of quality was 51% (maximum score: 100%) which was considered deficient according to the parameters of the tool. The best performance was obtained for cancer hospitals in Medellín (61%) and for a general hospital in Bogotá (56%). The best disease results were obtained in NSCLC (62,4%) and the worst in breast cancer (47%). These results, according to the dimension evaluated were: 33,6% Patient identification, 44,3% oncologic history, 58,2% physical exam, 71,7% diagnostic tests, 33,8% treatment plan and 98,2% readability. Conclusions: Although Medellin and Bogota had the highest comparative performance in this study, the overall results were low. Oncologic history and treatment plan showed deficiencies in their performance, which should be highlighted due to important items such as evaluation of functional scales (ECOG) and intentionality of interventions were considered within adequate decision making. This quality tool is a contribution to the specific evaluation of quality in oncology for countries like Colombia.