Yes the open enrolment principle means that any person can join any medical scheme of their choice. The only exception is restricted medical schemes, like SAMWUMED where you can only join if you meet the eligibility criteria. Eligibility criteria must be based on the grounds provided in the Act and which includes employment or membership of a particular employer, profession, trade, industry, calling, association or a union which has established a scheme exclusively for its employees or members. In the case of SAMWUMED the Scheme caters for employees from local government (municipalities) and associated agencies.