In a suit filed at the federal high court Abuja, Yusuf asked the court to nullify his suspension and declare that the board has no power to discipline him.
Joined as respondents in the suit filed on Monday are Isaac Adewole, minister of health; Abubakar Malami, minister of justice and attorney-general of the federation.
The Executive Secretary was suspended by the NHIS governing board, over allegations of financial infractions and abuse of office.
But he had argued that his suspension was illegal, and that only President Muhammadu Buhari had the powers to take such action against him.
In the suit filed on his behalf by Uchechukwu Obi, his counsel, the Executive Secretary prayed the court to declare that the governing board also lacked the powers to discipline him and that they are “not empowered to get involved in the day to day administration of the scheme”.
He also asked the court to issue an order of perpetual injunction restraining the defendants or “anyone acting on their behalf” from “disturbing, continuing to disturb, obstructing, continuing to obstruct the plaintiff from carrying out his official duties as the executive secretary of the scheme.”