Richard Callaghan, a prominent American figure skating coach who was suspended from the sport last year, was barred permanently on Wednesday, 20 years after he was first accused publicly of sexual misconduct involving a minor.

The decision to bar Mr. Callaghan for sexual misconduct was announced by the U.S. Center for SafeSport, a nonprofit organization created to investigate abuse of athletes. U.S. Figure Skating, the sport’s national governing body, followed suit and also barred Mr. Callaghan, who is 73, from any skating-related activity in the United States. He has long denied any wrongdoing.

Mr. Callaghan is best known for coaching Tara Lipinski to an Olympic gold medal in 1998 and coaching Todd Eldredge to a world championship and six United States titles .

In 1999, Craig Maurizi , a prominent coach and former student of Mr. Callaghan’s, told The New York Times that Mr. Callaghan had begun abusing him when he was 15 years old. Two other skaters also accused Mr. Callaghan of inappropriate behavior in the Times article.