This study was aimed at investigating outpatient visit of the intellectual disabled with diabetic complications. Study subjects were selected from the National Health Insurance reimbursement database of Taiwan, and analyzed the relationship between outpatient visit and relevant factors. This research found average age of study population was 46.8 and average annually outpatient visit was 11.7. Female subjects had higher DM prevalence and more outpatient visits than their male counterparts. Annually outpatient visits of patients younger than 18 were higher than older than 65, age between 45 and 64, age between 19 and 44. The average visits for each group were 14.1, 13.3, 11.7 and 10.4, respectively. This study found medical centers and hospitals were the favor medical facility for subjects to acquire their treatment other than local clinics. Annually outpatient visits of medical center, metro hospital, area hospital and local clinics were 12.5, 12.1, 11.9 and 10.7, respectively. The ownership of hospital was also a factor for study population in seeking medical help. Annually outpatient visits foundation hospital, public hospital and private hospital were 12.8, 11.4 and 11.1, respectively. For intellectual disabled with diabetes mellitus, factors affect outpatient visits were gender, age, level and ownership of medical facility. Degree of disability, on the other hand, was not the determining factors.