Do MSW medical and psychiatry become psychologist?

No, a Master of Social Work (MSW) in medical or psychiatric social work does not automatically make someone a psychologist. While MSWs in these areas work closely with mental health, they are trained in social work, not psychology. Psychologists require a doctoral degree (Ph.D. or Psy.D.) in psychology. Their training and scope of practice are significantly different, although there can be some overlap in the types of clients they see.