Samding Dorje Phagmo Tenpai Wangchuk (1855–1882) was the eighth Panchen Lama of Tibet.
8th Panchen Lama, Tenpai Wangchuk, also known as Namgyal Wangdui Gyaltsen, was born in 1855 in Namling County (རྣམ་གླིང་རྫོང་། 南木林), Shigatse prefecture, western Tibet.
In 1860 Tenpai Wangchuk (aged 5), in the presence of Reting Rinpoche Hutukthu, was finally enthroned as the 8th incarnation of Panchen Lama in the Tashilhunpo Monastery.
In 1877 (or 1878) Tenpai Wangchuk along with regent Tenzin Hutukthu identified the 13th Dalai Lama using the Golden Urn.
All the tombs from the Fifth to the Ninth Panchen Lamas were destroyed during the Cultural Revolution and have been rebuilt by the 10th Panchen Lama with a huge tomb at Tashilhunpo Monastery in Shigatse, known as the Tashi Langyar.