He made his first ascent of the Everest in 1994 when he was 24 years old.
He and his team started climbing last night from South Col (Nepal Side) and reached the summit at around 8:30 am today, according to Pemba Sherpa of Seven Summit Treks, which organised the record expedition.
Climbing from the Chinese side of the mountain, Sherpa's trip the summit extended her own women's record. He has also climbed numerous region's other high peaks, including K-2, Cho-Oyu, Manaslu and Lhotse.
Both of the other previous record holders are retired from climbing. In the autumn, he guides clients to smaller peaks in Nepal. However, an informed source from Everest Base Camp told The Kathmandu Post that Phurba Tashi may climb Everest again.
Sherpa is a single mom to three kids and lives in Hartford, Connecticut where she works as a dishwasher at the local Whole Foods.
Apart from Kami, dozens climbed the mountain Wednesday, Shrestha said from the Base Camp.
"This has paved the way for other climbers to reach the summit as well".
Sherpa climbed the Everest for the 21st time in 2017.
Drama on the the highest slopes of Everest this morning where, during a summit bid on the Tibetan side of the mountain, a group of mountaineers belonging to the Alpenglow expedition led by America's Adrian Ballinger encountered serious issues with their supplementary oxygen regulators.
Shrestha said a total of 94 climbers reached the summit on Wednesday because of good weather conditions.
More than 340 climbers will attempt the Everest summit in the coming weeks.
The climbing season for runs from March through May and hundreds of climbers are now on Everest, trying to reach the top from both the Nepali and Tibetan sides of the mountain.