Hi, If you don't mind the location, I know a pediatrician in St.Laurent who accept new patients.
Dr. Aly Attye
Clinique Medicale Plein Ciel
123, Boul. Cote-Vertu
Tel: 514- 337-3171
He need a reference, but you can just go to the clinic with your baby to see a general doctor there, then the general doctor will refer your baby to Dr. Attye.
Normally, every hospital has a Family Center. They only take baby who was born in that hospital. No reference needed. Ask the hospital where your baby was born.
Once your baby registered successfully, you and your family members are automatically legible to register in the same Family Center. Of course, you might not want to register if you already have a family doctor.