A Queens doctor has been charged with more than 50 counts of rape, sexual abuse, drug possession, and unlawful surveillance in connection with six victims at his apartment and at the hospital where he worked.

Dr. Zhi Alan Cheng was fired from New York Presbyterian Queens Hospital last December when he was arrested for drugging a girlfriend and raping her in his apartment.

But the story got even worse when investigators searched his electronic devices and found dozens of short videos showing him sexually abusing women both at his home and at the hospital, the New York Times reported.

Investigators filed 50 new charges against him on Monday.

Prosecutors said there were other victims who have yet to be identified, including five women who were assaulted in hotel rooms in New York, Las Vegas, San Francisco, and Thailand.

“The recovered evidence compiled paints the picture of a sexual predator of the absolute worst kind, a serial rapist, someone willing to not only violate his sacred professional oath and patients’ trust, but every standard of human decency, as well,” Queens District Attorney Melinda Katz said. “We will present the facts to a jury and achieve justice for the victims of the horrific assaults captured on video.”

According to the Times, the identified victims ranged in age from 19 to 47, and investigators found that some of the assaults came with multiple recordings.

Cheng was initially indicted last year on a 11 count indictment that included two counts of rape, criminal sexual act in the first degree, two counts of assault, two counts of sexual abuse, and four counts of unlawful surveillance, the DA’s office said. That indictment followed his victim’s discovery of videos of her assault on his phone.

The new indictment charges him with 10 counts of predatory sexual assault, three counts of rap, seven counts of sexual abuse, four counts of assault, three counts of criminal sexual act, 11 counts of unlawful surveillance, eight counts of criminal possession of a controlled substance, and four counts of criminal possession of a weapon.

He pleaded not guilty at his arraignment and was returned to jail, where he was being held without bond since his arrest in December.

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[Featured image: Zhi Alan Cheng/WABC screenshot]