Uprety contested the 1991 Nepalese legislative election as a Communist Party of Nepal (Unified Marxist-Leninist) candidate in the Taplejung-1 seat.
He won the election, defeating Nepali Congress candidate Mani Lama, with 12703 votes (47.19%).
When CPN(UML) was divided, Uprety joined the dissident Communist Party of Nepal (Marxist-Leninist).
He contested the 1999 legislative election as the CPN(ML) candidate in Taplejung-1, obtaining 1289 votes.
[2] The election was won by CPN(UML) candidate Til Kumar Menyangbo Limbu.