Pre-Existing Condition Prevalence for Individuals and Families

This analysis estimates that almost 54 million people – or 27% of all adults under 65 —have pre-existing health conditions that would likely have made them uninsurable in the individual markets that existed in most states before the Affordable Care Act. Almost half (45%) of non-elderly families include at least one adult with such a pre-existing condition. The analysis also includes estimates by age, state and gender.
Source: Reports on Health Reform issues from the Kaiser Family Foundation