The six-time Olympic medalist told 60 Minutes that she first spoke to the Federal Bureau of Investigation about the disgraced doctor in 2016, and doesn't understand why it took so long for the allegations to go public.
Raisman, 23, is the latest member of the U.S. national team and the biggest USA gymnastics star to reveal being molested by Nassar, who is facing more than 20 counts of sexual assault.
Raisman's teammate, McKayla Maroney, 21, revealed last month that she too had been molested by Nassar under the guise of medical treatment.
In the interview, Raisman said she wants help change the culture for future gymnasts.
Nassar also is awaiting trial on separate criminal sexual conduct charges and has been sued by more than 125 women alleging sexual abuse.
As for the silence that has surrounded Dr. Nassar's actions for so long, she asks, "Why are we not interested in what the Federation has done, what Larry Nassar has done, to manipulate these girls so much? they were afraid to talk?" She says she spoke to the Federal Bureau of Investigation after the Rio Games.
Dr. Nassar accepted a plea deal in July that would have him serve a combined sentence of 22-27 years for possession of child pornography, rather than charge him with sexual assault - a widely criticized move prosecutors justified by saying that numerous allegations they heard occurred overseas, where they have no jurisdiction. I can't. Every time I look at them, every time I see them smiling, I just think ... According to them, the osteopathic doctor was comforted by the particular environment of high-level gymnastics, where complaints and signs of injury could endanger Olympic dreams.
She went on to be the captain of the 2012 and 2016 Olympic teams.
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Baker said Boucher cooperated fully and reiterated that Boucher's liberal beliefs have nothing to do with the alleged assault. He added: "If (Boucher) had to do it over again, I can assure you that it might have been handled much more diplomatically".
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Raisman was the captain of the famous 2012 "Fierce Five" U.S. Gymnastics team, as well as captain of the 2016 team that competed in Rio de Janeiro. USA Gymnastics, in a statement to "60 Minutes", said it is "very sorry that any athlete has been harmed".
The list of Nassar's accusers also includes several former national team members.
It is also reported he still faces 33 charges of criminal sexual conduct in MI. "I just want to create change so that they never, ever have to go through this".
It was commissioned by USA Gymnastics and conducted by Deborah Daniels, a former Federal prosecutor, who spent a significant portion of her career prosecuting child sexual offenders, and scrutinised the organisation's methods.
Who else came forward with accusations against Nassar?USA Gymnastics hired Kerry Perry as its new president and CEO on Tuesday after president Steve Penny resigned in March after 12 years on the job.
Aly Raisman is the most prominent athlete to come forward so far about Nassar.
USA Gymnastics approved a new safe sport policy as a result of the recommendations made by the review.
In July, the organization hired Toby Stark, a child welfare advocate, as its director of SafeSport.