Вот что нашел на сайте Келы
https://www.kela.fi/web/en/from-oth...nd-medical-care
Family members
Family members who move to Finland have a similar right to medical treatment as the family member who works in Finland or receives a pension.
Family members staying in Finland temporarily are entitled to public healthcare. They pay the same client fee as local residents. They are issued a certificate by Kela, and by presenting the certificate, they will receive healthcare. The certificate is called ‘Certificate of entitlement to treatment in Finland’.
То есть есть какой-то сертификат, который должна выдавать Кела членам семьи
