"I believe there was an assumption that he was a drinker, and his problems were caused by alcohol and that the effort going into saving him would be useless anyway because he'd just go back to drinking," Grose told the ABC.
Yunupingu was later moved to Darwin Private Hospital after the incident and is due to be discharged today.
The claims that Yunupingu was racially profiled have been rejected by Dinesh Arya, the Executive Director of Medical Services at the Top End Health Service, which oversees the hospital's service delivery.
"It is concerning it has been suggested that some care assumptions may have been made based on the patient's race — I would like to categorically reject these claims," Arya told the ABC.
It's not the first time Yunupingu has been the target of alleged racism, in 2012, while on tour with singer Missy Higgins, he was refused a taxi in Melbourne after performing at the Palais Theatre.
Yunupingu has won several ARIA awards, sung for Queen Elizabeth ll, topped the charts in Italy, France, Spain and the Netherlands and sung duets with Delta Goodrem and Sting.