Yes, if you need services before you get OHIP, by a doctor, midwife or any other health care professional, you need to negociate payments. As in "Hello, I don't have OHIP yet but could we make arrangements to pay cash?". They will then tell you what they expect in the way of payment. I had a GP in Toronto that before I got OHIP charged me very moderately as in: "I don't know, just give me 5 bucks". I know many professional walk-in clinics would charge people without insurance $100 just for a visit. It just depends on what you negociate on.