www.ontario.ca/page/apply-ohip-and-get-health-card
To meet the minimum qualifications you must:
be physically in Ontario for 153 days in any 12‑month period
be physically in Ontario for at least 153 days of the first 183 days immediately after you began living in the province
make Ontario your primary residence
You must also meet at least one of the following additional requirements. You:
are in Ontario on a valid work permit and are working full-time in Ontario, for an Ontario employer, for at least six months
if you meet this requirement, your spouse and dependants may also qualify for OHIP
