A total of 408,841 New Yorkers signed up or re-enrolled in health insurance on the state's exchange as of Feb. 22, a federal report said Tuesday.

That number is likely to change, as New York extended its deadline to Feb. 28 for those who started the application but could not finish it by the original Feb. 15 deadline.

NY State of Health also offers a special enrollment period for New Yorkers who must pay a federal tax penalty for 2014 for not having health insurance. That started March 1 and ends at 11:59 p.m. April 30.

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The report released by the federal Department of Health and Human Services said close to 11.7 million people nationwide picked a plan or were automatically re-enrolled in marketplace coverage. Of those, 8.84 million were in the 37 states using the federal HealthCare.gov platform and 2.85 million were in the 13 states, including New York and the District of Columbia, that have their own exchanges.

Among New Yorkers, 35 percent were new enrollees and the rest were signing up again, the report said. And most -- 73.5 percent -- in New York's exchange qualified for financial assistance. That compares with close to 87 percent in the HealthCare.gov states.

"In New York, 300,498 marketplace consumers qualified for tax credits to make their coverage affordable and accessible," HHS Secretary Sylvia Burwell said in a statement. "People who come to the marketplace for coverage are actively engaged and shopping for the product that's best for them and their families."

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In New York, 130,829 people under the age of 35 -- or 32 percent -- are signed up for coverage, the report said. Nationwide, more than 4.1 million under the age of 35 -- or about 35 percent -- have signed up. That is up 1 percent from 2014, the report said. Attracting young, generally healthy consumers is considered key to keeping insurance costs down.

Among the 13 states and Washington, D.C., using their own exchanges, 60.6 percent chose silver plans and close to 25 percent selected bronze plans.

The federal tax penalty for those who did not get any insurance last year is 1 percent of 2014 income or $95 per adult, whichever is higher. In 2015 it rises to $325 per adult or 2 percent of household income, whichever is higher.