Sa1496 Longitudinal Demographic Trends of Nationwide GastrointestinalRelated Emergency Department Visits Sara Mamman, John Weissert, Beneet K. Pandey, Kimberly Siegler, Lyndon V. Hernandez*, Ashwin N. Ananthakrishnan, Nalini M. Guda, Peter Tonellato GI Associates, LLC, Franklin, WI; University of Wisconsin Milwaukee, Milwaukee, WI; University of Wisconsin Madison, Madison, WI; Massachusetts General Hospital, Harvard Medical School, Boston, MA; Harvard Medical School, Boston, MA; St. Luke’s Medical Center, Milwaukee, WI Background: GI-related emergency department (GI-ED) visits accounted for 12% of all ED visits and $27.9 billion in healthcare costs in 2007. However, prior studies have not elucidated the epidemiological trends of these visits, nor its consequent endoscopic procedures, over the years leading to and recovering from, the 2008 recession. Aim: To identify demographic trends of GI-emergency department (ED) visits and inpatient endoscopies using nationwide data over a five-year period. Methods: We evaluated the longitudinal demographic patterns of seven common GI diagnoses; nausea/vomiting, abdominal pain, functional disorders, gastritis/duodenitis, GI hemorrhage, impaction, gallstones. We used the National Emergency Department Sample (NEDS) and National Inpatient Sample (NIS) to observe trends in age, sex, race, payer status and socioeconomic status between 2006-2010. National estimates were collected from ICD-9-CM diagnosis and procedure codes, adjusted for population size, and tested with two sample z-tests for significance. Results: Women had 1.68 times more GI-ED visits when compared to men (Figure 1), and both sexes exhibited significant growth in GI-ED use between 2006-2010 (p!0.01). When stratified by diagnosis, gender differences in GI-ED visits were attributed to abdominal pain, nausea and/or vomiting, and gallstones (Table 1). Additionally, GIED visits grew significantly between 2006-2010 for both patients living in impoverished (!$39,000/year) and middle/high-income zip codes (Figure 1, p!0.05). However, the GI-ED visits of patients from impoverished zip codes were statistically insignificant from the number of visits from middle and high-income zip codes. Of the six inpatient principal endoscopic procedures that were studied, the greatest risk difference between women and men was observed in EGD with biopsy, followed by