Earlier reports did not mention in detail under what circumstances Maxwell was taken to the hospital but a Sydney Morning Herald report said that he lost consciousness and woke up on the way.
According to Daily Telegraph, Maxwell was out drinking and watching a concert by 'Six and Out', the band featuring former Australian fast bowler Brett Lee, when he felt unwell.
Maxwell, who has not played Test cricket since September, 2017, is under no illusions how difficult it is to break into Australia's Test squad.
Rohit Sharma has been named captain of the ICC Team of the Tournament.
Maxwell played the innings of his life to take Australia to the last four of the World Cup against heavy odds.
Maxwell smacked 10 sixes and 21 fours in his batting pyrotechnics and McDonald said it would take time to fully appreciate the magnitude of the feat.
During the course of his glorious knock, Maxwell suffered serious cramps and was struggling to stand on his feet at one point.
Australia's first double-century maker in ODIs, Maxwell also became the first anywhere to reach 200 during an ODI chase.
The is Maxwell's second freak injury in less than a year. Last November, he broke his leg at a birthday party in Melbourne.
He broke the record of South Africa's Aiden Markram who scored a 49-ball hundred against Sri Lanka at the same venue earlier in this edition.