This question already has an answer here:
How should one approach the question of change of career in an interview? What appropriate reasons can one provide that would not look bad on them. To briefly explain the situation:
My friend is a Medical professional who worked briefly in a private hospital. Soon the workplace environment made it impossible to continue and self-practice was not a viable option.
It has been a year now and he just got an interview call from a government institute in insurance sector.
Since the question has been closed due to being deemed duplicate, let me clarify that question is not about "change of jobs". My friend is changing career from a doctor to a desk officer. That is, he will no longer be practicing as a doctor.
Nonetheless, Lawrence Aiello's suggestion seems the best option.