The travel medical insurance must confirm to the following requirements for short stay in the Schengen area (stay up to 90 days):

1. coverage of costs incurred as a result of medical repatriation, emergency medical and hospital treatment, or death,
2. coverage of up to the amount of at least 30,000 EUR(45,000 USD),
3. cover the entire period of your stay in the Schengen area,
4. cover the entire territory of the Schengen area.

For long stay (over 90 days) please go to the website Travel medical insurance during a stay longer than 90 days - Ministry of the interior of the Czech Republic (mvcr.cz)