Sex offender OB/GYN Robert Hadden is behind bars for the first time since charges were filed nearly 30 years ago.

Former Columbia University gynecologist Robert Hadden was jailed Wednesday after a Manhattan federal judge heard nine women the doctor had sexually assaulted in his 30-year career.

Judge Richard Berman also received letters from 43 additional victims asking him to imprison Hadden before he begins serving time in federal prison for luring four out-of-state women into his practice to molest them.

The judge refused to listen to further arguments from Hadden’s lawyers.

“I finished and you finished,” he said.

Berman noted that people were “baffled” about how Hadden had eluded justice for so long.

“There is a feeling that he somehow bypasses the process,” Berman said.

The first woman complained about Hadden’s mistreatment in 1994, prosecutors told the court, but Columbia University allegedly did nothing. Almost 20 years passed before he was arrested, and almost 30 years before he was sent to prison.

Former Manhattan District Attorney Cy Vance Jr. filed a criminal case against Hadden in 2014 for molesting and performing oral sex on patients. Laurie Kagnok reported the attack on Hadden to police days before her 2012 birth. She was one of several women who assisted public prosecutors in their case, which in 2016 ended in a slap in the face and no jail time.

After the feds filed charges in 2020, the doctor was released on $1 million bail.

Former patient Stephanie Fishman asked Berman to strip Hadden of the power and privilege she said he had long abused.

“He is strong because we are all standing here. He’s not in jail. We beg for him to be there,” Fishman said Wednesday.

“Finally give us strength and get him off the streets,” Fishman said.

Hadden’s lawyer Deidra von Dornum asked Berman to keep her client free until he is sentenced in April. She claimed that he made great progress by attending therapy, church, and keeping a diary. She said that with his electronic ankle bracelet, he could not walk 100 feet from his home in Englewood, New Jersey, without alerting the authorities.

Urging Berman to take Hadden into custody, Assistant U.S. Attorney Jane Kim asked the court to take into account the “staggering” extent of his crimes.

Kim said that Hadden got away with his perverted ways for so long hiding behind his white doctor’s coat and “Columbia prestige”.

“Now he is hiding behind new excuses,” the prosecutor said.

According to Marissa Hechstetter, one of the first women to come forward, the number of his former patients who came forward in one form or another now stands at more than 350. Kim said prosecutors have spoken to 235 of them.

The criminal conviction came after a cascade of civil lawsuits against Hadden and the institutions where he committed abuses.

Columbia University Irving Medical Center and the New York-Presbyterian jointly paid $236 million in compensation.

Hechstetter told Berman that she had been speaking to mayors, governors, city council members, state legislators and several government bodies for ten years after Hadden’s abuse of her became known. She was instrumental in lobbying legislators to pass the current Adult Survivor Act.

She told the Daily News that she never lost faith that Hadden would one day be held accountable.

“I didn’t want to hope, but it was clear,” she said. “There was a time.”