He belonged to the Phagmodrupa dynasty, which was the leading regime of central Tibet from 1354 to 1435 and maintained a certain political role until the early 17th century.
Four years later his uncle, King Kunga Lekpa, himself acquired the abbot-ship of Thel, and Ngagi Wangpo had to stay in a succession of other places.
In 1481 Kunga Lekpa was deprived of the kingship by a council of ministers, after a series of invasions by Donyo Dorje of Rinpungpa.
[1] During his decade-long reign Ngagi Wangpo was honoured by the elites of Central Tibet as their overlord (chipon).
The Ming dynasty of China by this time had only the faintest knowledge of internal Tibetan politics, since they noted the accession and subsequent death of Ngagi Wangpo in 1495; they knew the king by the name Ban Aji Jiangdong Daba.