Link: http://www.health.gov.on.ca/en/public/publications/ohip/ohip_eligibility.aspx
you are a foreign worker who holds a valid work permit or other document issued by Citizenship and Immigration Canada (CIC) permitting you to work in Canada, and you also have a formal agreement in place to work full-time for an employer situated in Ontario which sets out the employer's name, your occupation, and confirmation that you will be working for no less than six consecutive months;
If you don't have this, then need to wait for AIP (Approval in Principle) for inland PR app:
you have submitted an application for permanent residence in Canada, and Citizenship and Immigration Canada has confirmed that you meet the eligibility requirements to apply for permanent residence in Canada