- Of the 40.7 million who were uninsured in 2013, 14.5 million gained coverage, but 5.2 million of the insured lost coverage, for a net gain in coverage of approximately 9.3 million. This represents a drop in the share of the population that is uninsured from 20.5 percent to 15.8 percent.
- The 9.3 million person increase in insurance is driven not only by enrollment in marketplace plans, but also by gains in employer-sponsored insurance (ESI) and Medicaid.
- Enrollment in ESI increased by 8.2 million.
- Medicaid enrollment increased by 5.9 million. New enrollees are primarily drawn from those who were uninsured in 2013, or those who had “other” forms of insurance, including Medicare, retiree health insurance, and other government plans.
- According to our estimates, 3.9 million were covered through the state and federal marketplaces as of mid-March 2014. This figure does not fully capture the enrollment surge that occurred in late March.
- For most people the ACA has not changed their health insurance coverage. Among adults, 80 percent still had the same form of coverage in March 2014 as in September 2013. Notably, more than 100 million had ESI before and have ESI now, while 26 million remain uninsured.
- Of those who were previously uninsured but are now insured, 7.2 million gained ESI, 3.6 million are now covered by Medicaid, 1.4 million have signed up through a marketplace, while the remainder gained coverage through other sources.
- Our estimates suggest that only about one-third of new marketplace enrollees were previously uninsured. While this percentage seems low in absolute terms, it is slightly higher than an earlier figure reported by McKinsey & Company.[1]
- Among the 7.8 million people who were enrolled in off-marketplace individual market plans in early 2014, 7.3 million were previously insured; 5.4 million were previously insured through an individual market plan.
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Less than one million who previously had individual market insurance transitioned to being uninsured. While we cannot tell if these people lost their insurance due to cancellation or because they simply felt the cost was too high, the overall number represents less than one percent of people between the ages of 18 and 64.