An Ottawa psychiatrist convicted of sexually assaulting a patient has seen his house arrest upgraded to a two-year prison sentence by Ontario's highest court.

Dr. Juan Tejeda was found guilty of two counts of sexual assault after a former patient testified the psychiatrist plied him with alcohol to have sex in his office, car and in the victim's apartment.

Tejeda, 66, was handed a conditional two-year sentence in December, which included 16 months of house arrest and 240 hours of community service.

On Tuesday, the Ontario Court of Appeal imposed a prison term, saying the original sentence was "manifestly inadequate" given the "extreme nature of the breach of trust."

The Crown, which appealed the sentence, was asking for a four-year prison term, but the court said it had to consider Tejeda's age, his health problems and the five months house arrest he's served.

The sexual assaults on the patient took place from 1990 to 1999, and court heard the victim had attempted suicide.