Introduction: Carcinoid tumors are slow-growing neuroendocrine malignancies that classically originate from either the gastrointestinal (GI) tract or pulmonary system. Methods: Retrospective analysis of National Inpatient Sample from January 2008 to December 2011 was performed. International Classification of Diseases, Ninth revision, Clinical Modifications codes were used to identify discharges with a primary diagnosis of carcinoid tumors (CNT). Outcomes analyzed include intestinal obstruction, and inpatient mortality among colonic, small intestinal and appendiceal CNT. Results: There were 21,147 hospital discharges with a principal diagnosis of CNT. Among those discharges, there were 60 % small bowel carcinoid (SBCNT), 22 % colon carcinoid (CCNT) and 18 % appendiceal carcinoid (APCNT). Out of the total number of CNT, 30% were classified as benign and 70% were malignant. The percent malignancy varied between SBCNT (33%), CCNT (31%) and APCNT (7%), p< 0.0001. Figure 1 shows the distribution of metastasis among sites.Figure 1Thirteen percent of the total CNT population was admitted with obstruction of the intestine, and 2% developed ischemia. CCNT and APCNT had lower odds of obstruction compared with SBCNT (aOR=0.51, 95 % CI, 0.39-0.66) and (aOR=0.25, 95 % CI, 0.15-0.40) respectively. Malignant CNT had 1.5 times increased odds of developing obstruction particularly if the metastatic site was the peritoneum (aOR=2.85, 95 % CI, 1.87-4.37). Increased odds of obstruction was also observed among patients who were > 85 years (aOR=3.08, 95 % CI, 2.02-4.69) and in the lowest SES group (aOR=1.48, 95 % CI, 1.07-1.96. The overall in-hospital mortality for all CNT was 2%. A significantly higher proportion of CCNT patients that died 4% compared with SBCNT 2%, p< 0.0001. Less than 1% of the APCNT patients died. Malignant CNT were two times more likely to influence inpatient mortality, especially metastasis with peritoneal metastasis (aOR=2.93, 95 % CI, 1.20-7.47). ICU admissions were associated with twelve times increased odds of inpatient mortality. Conclusion: Among hospital discharges, SNCNT was the most frequent form of intestinal CNT encountered. The majority of admission were associated with malignant CNT and found either in the small intestine and colon. Intestinal obstruction was more commonly seen in malignant CNT, SBCNT, patients above 85 years old and those with peritoneal metastasis as well as from the lowest SES group. Mortality was highest in those with CCNT, malignancy, and ICU admission.