A former University of Ottawa Health Services doctor is facing dozens of new sexual assault and voyeurism charges.

Ottawa Police say Vincent Nadon, 56, of Chelsea, was charged Thursday with 43 counts of sexual assault and 40 counts of voyeurism.

These charges are in connection with 40 new alleged victims, all of them women, and police say the alleged offenses could have taken place as far back as the 1980s. They say all the victims were connected to his work as a family physician. 

"I think this case is exceptional in the number of victims," said Sgt. Carolyn Botting with the Ottawa Police Sexual Assault and Child Abuse Section. "This is certainly a breach of trust."

Nadon was first charged by police in January, following a complaint from a patient at the Rideau Street UOHS clinic. That patient claimed Nadon was secretly filming her appointment. 

"We don't know when they started but we know they span back at least 27 years," she added. 

The University said, upon learning of the charges, Nadon was barred from practicing at any of their clinics.

In February, 10 more sexual assault charges were laid against him.

Nadon will appear in court again on Monday. He was taken into police custody on Thursday and will be held over the weekend at the Ottawa Carleton Detention Centre. 

Investigators say there may yet be more possible victims.

Anyone with information is asked to contact the Ottawa Police Service Sexual Assault and Child Abuse Unit Tip Line at 613-236-1222, ext. 5760