Michael Bloomberg, the billionaire businessman and former three-term mayor of New York City, has sunk at least $200 million on television advertising in his bid to become the Democratic nominee for president. That’s a staggering sum relative to his Democratic rivals as he lays out his argument for why he can beat President Trump in November.

A television ad that aired more than 42,000 times across the country during the first three weeks of January claims: "Mayor Bloomberg helped lower the number of uninsured by 40 percent, covering 700,000 more New Yorkers."

Since Bloomberg emphasizes his record on health care as a reason why voters should choose him, we wondered if he is right.

Bloomberg campaign spokesman Michael Frazier sent data to back up the claim, as well as documents showing what efforts the Bloomberg administration made to encourage people without health insurance to become insured.

The numbers

Bloomberg, who was mayor from 2002 to 2013, said he helped lower the number of people without health insurance by 40 percent, covering 700,000 more New Yorkers.

His campaign cited a 2003 report from the United Hospital Fund, which used data from the Census Bureau’s Current Population Survey in March 2002. The survey showed 1.8 million New York City residents under age 65 were uninsured in 2001. (Health policy researchers typically omit people age 65 and older from analyses of health insurance coverage, given federal programs such as Medicare available to this age group.)

In 2013, the American Community Survey, also produced by the Census Bureau, reported an estimated 1.105 million New York City residents under 65 were without health insurance, a reduction of 695,000, or 38.6 percent, between 2001 and 2013.

Health policy researchers we spoke with said that Bloomberg’s numbers are generally accurate, though they noted the Current Population Survey and American Community Survey are different data sources.

The data sets contain "slight differences," but "it is common in the field to use the two together across large gaps in time," said Catherine Arnst, director of public information for the United Hospital Fund, which produced the first study cited by Bloomberg.

The context

Health policy researchers said the efforts to improve access to insurance extended beyond New York City.

Sherry Glied, a health economist who was assistant secretary for planning and evaluation in the U.S. Department of Health and Human Services, said New York State expanded Medicaid to low-income people in October 2001, and further expansions followed that decade. In 2000, the state created a new subsidized private insurance program called Healthy NY, Glied said.

"The Bloomberg administration definitely ‘helped’ people enroll in those plans - setting up a special office to do so," Glied said.

Katherine Hempstead, who studies health data as a senior policy adviser with the Robert Wood Johnson Foundation, said changes in state policy might have played a role in lowering the number of people without insurance during that time period.

The downward trend "may reflect the fact that the state of New York expanded Medicaid in 1999 with the passage of the Health Care Reform Act," Hempstead said.

To support its claim, the campaign cited the ways the Bloomberg administration helped get people covered. Among them: Bloomberg signed legislation that required the city health department provide pamphlets outlining public health insurance options in daycare centers and required the centers to make them available to parents and guardians. Through a grant from the New York State Health Foundation, New York City also set up a website in 2009 to educate people without insurance about their options. This included information on how to make health insurance more affordable and a tool to help individuals determine whether combining private and public insurance would bring down their costs. The city introduced an online pre-screening tool for health insurance eligibility in 2007, and it introduced online renewals of public insurance coverage in 2010.

The Affordable Care Act, President Obama’s health care initiative, passed in 2010 but did not substantially take effect until 2014. So, it probably did not affect the number of people who gained insurance before then, Hempstead said.

Our ruling

Bloomberg claimed that in New York City, he "helped" lower the number of uninsured by 40 percent, and that 700,000 people obtained health insurance during his administration.

His numbers are generally correct, and he is correct to say that he "helped." He isn’t taking full credit, and that is wise. State programs gave greater access to health insurance, while his administration worked to raise awareness about that access.

We rate Bloomberg’s statement True.