He went to Germany (Mainz) to learn about ESWL and PCNL, then he went to Long Island Jewish Hospital, US for a rotating fellowship in endourology.

Desai started the first ESWL Center in Ahmedabad in 1988 and consequently added endourology to the service for treating kidney stone patients.

He is credited and recognized in the world for developing UMP (Ultra-Mini PCNL) in partnership with a German Company named Schoelly GmbH.

[5] In February 2024, Dr. Janak Desai was awarded the John Wickham Medal & lecture by the Royal Society of Medicine, London.

Desai delivered the ‘Malcolm Coptcoat Lecture" in the British Urology Society-Endourology section annual meeting in 2012.