Photo: HP Nadig 

As a God:
He is considered the avatar of Vishnu, that provides good health and immortality related stuff. In his picture he is depicted with rare herbs and a pot containg the juice (amrit) of longivity and immortality.

As a person:
He is called early medical practitiner and surgeon and the source of Ayurveda.

Mantras:
It is believed that one who chants Dhanvantri mantra, recieved good health, longevity and abundance in life.

Om Dhanvantraye Namah

and

Om Namo Bhagavate Maha Sudharshana
Vasudevaya Dhanvantaraye Amrutha Kalasa Hasthaaya
Sarva Bhaya Vinasaya Sarva Roka Nivaranaya
Thri Lokya Pathaye Thri Lokya Nithaye
Sri Maha Vishnu Swarupa Sri Dhanvantri Swarupa
Sri Sri Sri Aoushata Chakra Narayana Swaha

Mantra chants –>