A psychiatrist is a medical doctor, who has specialised in the field of psychiatry. To be able to practice, a psychiatrist must be registered with the Health Professions Council of South Africa (HPCSA), as a psychiatrist, under the specialist register.
After this a doctor could specialise and become a “specialist”. It takes another four years of study to gain the qualification to practice as a psychiatrist. This qualification is usually indicated as a MMed Psych or a FF Psych or FC Psych.
Source: South African Society of Psychiatrists