Research shows significant health disparities between persons with and without intellectual and developmental disabilities (IDD). An annual comprehensive preventive care assessment which includes a complete physical exam (CPE) is a recommendation to reduce health disparities experienced by this population. The main purpose of this study was to report rates of CPE among the IDD and non-IDD population over time and to identify characteristics that lead to one receiving a CPE. This was a retrospective cohort study based on several years of administrative data (1995/96 - 2014/15). The study found that CPE rates were higher among the IDD population. History of CPE, history of mental illness, majority of care, region of residence, sex, and socioeconomic status were significant predictors of one receiving a CPE. The results from this study have potential to influence policies, programs and in turn contribute to improving the health of this population.