Dhanvantari is the physician of the devas in Hinduism. He is regarded to be an avatar of Vishnu. He is mentioned in the Puranas as the god of Ayurveda.
During his incarnation on earth, he reigned as the King of Kashi, today locally referred to as Varanasi. Dhanvantari is also identified as the great-grandfather of Divodasa, a mythological King of Kashi in the Vishnu Purana.