A view of South Col near the summit of Mount Everest.
Mount Everest can also be climbed from Tibet and casualties have been reported from there this season, too.
Most of the deaths have been attributed to exhaustion and tiredness because the clogged route has caused delays because so many people are on the world's tallest mountain.
"An attorney in his "day job, ' he was an inveterate climber of peaks in Colorado, the West and the world over". Most are believed to have suffered from altitude sickness, which is caused by low amounts of oxygen at high elevation and can cause headaches, vomiting, shortness of breath and mental confusion.
Among them are four Indians, an Austrian and one person from Nepal.
Eight other climbers have died on other 8,000-metre-plus Himalayan peaks this season, while two are missing.
Last week, Indian climber Anjali Kulkarni, 55, also died on her way back from climbing to the summit, her son Shantanu Kulkarni told CNN.
An estimated 600 people had reached the summit via the Nepal side by Friday, a government official said, based on information from expedition organisers.
"I've seen traffic, but not this insane", said Purja, who has summited Everest four times. "She couldn't move down on her own and died as Sherpa guides brought her down".
The 14-strong team sent by the government spent about six weeks scouring for litter at base camp and at Camp 4 - almost 8,000 metres up - scraping together empty cans, bottles, plastic and discarded climbing gear.
He was taken to a hospital in Nepal where his condition improved.
In a statement provided to the ABC, the Department of Foreign Affairs and Trade said it was "ready to provide consular assistance to an Australian man hospitalised in Kathmandu".
Fellow mountaineer Peter Hilary, son of Sir Edmund Hilary, hopes that the recent problems on Everest won't stop people from exploring but says there needs to be "a little common sense".
At 29,029 feet and situated in the Himalayas, scaling Everest is the dream of thousands of climbers. An equal number of Nepalese guides are helping them get to the top. But Nepal's side is unregulated, and there is no cap on how many permits are given.
Hundreds of climbers reached the summit this season, and the total could go past last year's record of 807 ascents.
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