It is the first new identification of a World Trade Center victim since 2015, when Matthew David Yarnell, 26, was identified using DNA.
The city's Office of the Chief Medical Examiner had been re-testing DNA recovered in 2001 using new, more sensitive testing, reports the BBC.
The medical examiner's office identified the remains through DNA testing.
Many of those who died in the September 11 terrorist attacks at the World Trade Centre in 2001 have not been identified. The medical examiner was previously limited by technology in its ability to test the samples.
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This effort has not been simple as very few full bodies were recovered following the disaster.
Few full bodies were recovered after the giant towers burned and collapsed, and the effects of heat, bacteria and chemicals such as jet fuel made it all the more hard to analyse the remains.
New, more delicate DNA innovation was sent not long ago and helped make the most recent recognizable proof after prior testing created no outcomes, the restorative analyst's office said.
In some cases, scientists have gone back to the same bone fragment 10 or more times, hoping new technology will provide answers.
In total, the 9/11 airline attacks killed almost 3,000 people at three different sites in NY, at the Pentagon, and an area where a plane crashed near Shanksville, Pennsylvania.