In a public health crisis, these North Texas cities have some of the worst uninsured rates in the U.S.

Irving has the 7th highest rate of uninsured residents among the midsize U.S. cities sampled in a new study from the personal finance website WalletHub. Elsewhere in North Texas, Garland fared even worse, with the 5th highest rate among the 260 midsize cities in WalletHub’s report, while Mesquite had the 9th highest.

And Dallas, where more than 24 percent of residents are uninsured, has one of the worst uninsured rates of any city in the country. Only Houston has a higher rate among large U.S. cites, according to the study.

More than 22 percent of Irving residents — or roughly 54,000 people — do not have health insurance.

The study compared rates for a total of 548 U.S. cities and 50 states, including a breakdown by age, income level and other demographic information.

Rates of uninsured are the highest among low-income households in Irving, at 35.7 percent, and Hispanic households, at 38.9 percent.

After losing her health insurance earlier this year, D.j. Mattern, who has Type 1 diabetes, turned to a growing underground network of people with diabetes who share extra insulin free of charge when they have it.