As many as 17 million low-to-moderate-income Americans should be eligible for tax credits to buy private health insurance under President Barack Obama's healthcare law in 2014, according to a report by the Kaiser Family Foundation.
The subsidies are a provision of the law that aims to make U.S. health coverage more affordable. Enrollment in the health plans began on Oct. 1, but has been hobbled by technical problems that have halted access to the federal HealthCare.gov website meant to help people in 36 states verify their eligibility for subsidies and sign up.
The three states with the highest number of individuals who will qualify for the subsidies are Texas, where as many as two million people qualify; California, where some 1.9 million people qualify; and Florida, where 1.6 million people qualify, the Kaiser report said. It is based on an analysis of 2012 and 2013 population and economic data from U.S. Census Bureau.
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Overall, the report estimates, about 29 million people are potential customers for the exchange, including people who currently have no insurance and those who buy private insurance. The number excludes people who would be eligible for the Medicaid program for the poor.
The tax credits are only available for people who apply for coverage through the state-based health insurance marketplace. To qualify, individuals must have incomes of between 100 percent and 400 percent of the federal poverty level, which translates to a range of $23,550 to $94,200 for a family of four.
(Read more: How do Obamacare exchanges work?)
Those who qualify will be people who are not eligible for coverage from their employer or from Medicaid or Medicare, government insurance programs for the poor and elderly.
Use of the tax credits may vary by state, depending on how well the health insurance websites perform. Fourteen states are running their own online exchanges, and most have been operating more smoothly than HealthCare.gov.