60 Minutes airs Sundays at 7 p.m. on CBS. Raisman tells 60 MINUTES that after the Rio Olympics she spoke to FBI investigators about Dr. Nassar.
"I want people to know just because someone is nice to you and just because everyone is saying they're the best person, it does not make it okay for them to ever make you uncomfortable".
Raisman's revelation comes a month after fellow Fierce Fiver McKayla Maroney came forward to say she was abused by Larry Nassar for several years, beginning when she was 13. He was sacked by USA Gymnastics in the summer of 2015, but the federation waited five weeks before alerting the Federal Bureau of Investigation.
"In the a year ago, Aly has become an advocate for many issues, and sharing her personal experience of abuse takes great courage", USA Gymnastics said.
Last year, an Indianapolis Star investigation found that at least 368 gymnasts have alleged some form of sexual assault at the hands of their coaches or other adults involved with the sport.
USA Gymnastics said in a statement Friday that Raisman sharing her personal experience took "great courage" and it is "appalled by the conduct of which Larry Nassar is accused". "And I was so young I had never really worked with another doctor or trainer before and everyone said he was the best".
Aly Raisman is the most prominent athlete to come forward so far about Nassar.
"It's important to speak up for something and it's right".
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Raisman spoke with FBI investigators after returning from Rio de Janeiro, where she served as captain for the USA national team at the 2016 Olympic Games. That's why I want to talk about it. That's what bothers me. "You don't want to let yourself believe, but you know, I am a victim of sexual abuse". I can't...every time I look at them, every time I see them smiling, I just think...
Raisman also accused some top-ranking officials at USA Gymnastics of abhorrent behavior, claiming that she and her teammates from the 2016 Rio Games were ignored by a table of executives from the sport's governing body during their Hall of Fame induction this summer.
Raisman, 23, is the second of five female US gymnasts who became known as the "Fierce Five" en route to winning team gold at the London Olympics in 2012 to allege that she was sexually abused by Nassar.
At the 2011 world championships, Maroney said Nassar gave her a sleeping pill "and the next thing I know I was all alone with him in his hotel room getting a 'treatment.' I thought I was going to die that night".
"People should know that this is not just happening in Hollywood", Maroney wrote. "I had a dream to go to the Olympics, and the things that I had to endure to get there were unnecessary and disgusting"'.
Nassar is now in jail.
When first interviewed by an investigator hired by USA Gymnastics in 2015, Raisman did not immediately accuse the doctor, Larry Nassar, of inappropriate or illegal behavior. USA Gymnastics announced this week that Kerry Perry, formerly the vice president of business development at Learfield Communications, would start as CEO on December 1.
Raisman, 23, is now training to return in three years for the 2020 Games in Tokyo, an unprecedented move in the sport which would give her a shot at surpassing Shannon Miller's U.S. record of seven Olympic medals.
USA Gymnastics has adopted all 70 recommendations made by Daniels and is in the process of implementing them. He has already been charged with 22 counts of first-degree criminal sexual conduct. Olympic gold medalist Aly Raisman, one of America's most recognized athletes said the abuse happened to her too.
"Aly's passion and concern for athlete safety is shared by USA Gymnastics", the organization added.