The Manhattan judge dismissed charges against Jon, by three of his accusers, on the recommendation from the district attorney's office, the New York Post has reported.
"Anand Jon continues to insist he is innocent," Jon's lawyer Adam Freedman said in New York, adding that the charges dismissed by the court involved women "who knew him (Jon) longest."
Jon, in January, had pleaded not guilty to the charges of sexually assaulting at least nine women and underage girls in New York between 2002 and 2006 after being sentenced a jail term of 59 years by a Los Angeles court for similar crimes.
Born in India, Alexander -- known professionally as Anand Jon -- launched a fashion line in 1999.
He was featured on America's Next Top Model, worked with such celebrities as Paris Hilton and Mary J Blige.
The hearing in New York is separate from the case against 36-year-old Alexander in California, which concluded in 2008 with him being convicted of sexually assaulting seven women and girls and getting a sentence of 59 years' life imprisonment. The girls were as young as 14.
In New York, he was originally charged with preying on a dozen women after contacting them with offers of modeling opportunities.
In 2007, Alexander had been charged in New York but the case was in standby until the California case concluded.
He is also appealing the California decision.
Jon allegedly molested women between the ages of 15 and 26 by using drugs and the opportunity of modelling to lure women during the period between 2002 and 2006 in New York.
Proceedings against Jon "will continue for the remaining alleged casting couch assaults, including forcible rape, on nine other accusers, many of them young fashion models," the Post said.
Jon will next appear in Manhattan Supreme Court on December 8 to set a trial date.
