OBJECTIVES: Effects of malnutrition in patients with colorectal cancer (CRC) are often disregarded. This abstract aims to report nutritional supplement (NS) usage in CRC patient with abdominal resection surgery (ARS) in Turkey using general health insurance (GHI) reimbursement database of Social Security Institute (SSI). METHODS: Turkish GHI system has covered 98% of total population of Turkey. Therefore statistics obtained via the GHI database are highly representative of the population of Turkey. From GHI database, patient with CRC (by using ICD-10 code) who underwent any kind of ARS (by using relevant codes in national medical procedures code book) between 1jan2009 and 31dec2013 were included to analysis. RESULTS: Of 42,970 CRC patients with ARS in database, 27,471 patients (mean age: 61.5 years, 42.7% female and 2.0% used pre-operative chemotherapy) met selection criteria of this abstract. NS was used 6.3% of the patients during hospitalization (median 12.0 days) and NS was used median 2.0 days during hospitalization. Mortality rate was 4.6% during hospitalization. Of the 26,203 discharged patients, 1.7% used NS during outpatient follow-up duration and 1.3% used NS more than 30 days based on prescribing data. Moreover, 97.3% of patients who received NS during hospitalization did not continue NS usage during outpatient follow-up duration. Median survival durations were 60.0 and 47.7 months in patients not used NS and used NS, and 12-month survival rates were 80.0% and 68.0%, respectively. CONCLUSIONS: The abstract showed NS usage patterns in CRC patients with ARS in Turkey. Although malnutrition risk in CRC patients has been reported to be high, NS usage ratio is low and usage duration is relatively short. Moreover survival analyses revealed that NS seems to be given to patients with advanced stage of CRC. In conclusion strategies to increase usage of malnutrition diagnosis and treatment algorithm should be developed.