OBJECTIVES:  Study assesses latest trends of emergency department (ED) visits and associated socio-demographic and facility level factors of non-urgent and semi-urgent ED visits to explore if non-urgent ED visits deserve special attention anymore and if semi-urgent visits should be discussed more closely. METHODS:  Present study performed retrospective cross-sectional analyses of nationally representative ED visit data from National Hospital Ambulatory Medical Care Survey (NHAMCS) 2006 through 2011. Trend analysis, designed based F test, and weighted multinomial logistic regression were performed as statistical tools. RESULTS:  Proportion of non-urgent ED visits were decreased each year until 2009 from 14% to 8% and almost got stuck for rest of the years. Most of the non-urgent visits received some sort of diagnostic or therapeutic services. Percentage of semi-urgent ED visits increased largely over the study period (25% to 36%), while proportion of urgent increased little, and immediate and emergent acuity level decreased. In cross tabulation, residence type, source of payment, episode of care, availability of non-urgent fast track, and use of EMR are found significantly associated with all ED visits. In multivariable analysis, patients with Medicaid, no insurance, younger, male, non-Hispanic Black, and who visit in nonurban hospitals are highly likely to visited ED for non-urgent health conditions, whereas, self-pay patients, younger, male, and who visited voluntary non-profit hospitals are highly likely, and Medicare recipients and patient living in nursing home are less likely to visit ED with semi-urgent health conditions. CONCLUSIONS:  Non-urgent ED visits, along with semi-urgent visits deserve close attention and efforts to reduce these visits should focus on some particular groups who pose higher risks rather than blocking access to EDs.