The 50-year-old, identified only as AM or Martin, argued that the General Medical Council (GMC) guidance unreasonably stopped help being given to those who want to die.
He is almost totally paralysed by a stroke, unable to speak and wants to have the option of ending his life.
The court was told that in order for Martin to travel to a suicide clinic abroad he would need his medical history.
But the judges heard doctors would not do this as they could be seen to have assisted his suicide.
GMC guidance says when a patient raises the idea of assisted suicide a doctor must listen and discuss reason but cannot "encourage or assist" the person to die.
Lord Justice Elias and Mr Justice Collins, sitting in London, ruled the guidance lawful and threw out his case.