A private health insurance policy (DMS) - an essential part of the document package for a residence permit (ВНЖ). It is issued for one year, even if you plan to obtain a 3-year residence permit or permanent residence. This is a separate product, not to be confused with the state health insurance (ОМС, health card), which is arranged after receiving the residence permit.
The most popular insurance companies: Dunav, Wiener, Generali, Triglav, UNIQA, DDOR.
For a "minimal" package for a residence permit, people usually choose the cheapest options:
This DMS - private insurance required for obtaining a residence permit. The state health insurance is arranged after the residence permit is granted. Check the exact rates and coverage conditions with the chosen insurance company, as they may change.