A holder of both Drikung Kagyu and Nyingma lineages, the late lama established numerous monasteries and was widely considered to be the foremost phowa master of his generation.

The Berkeley Zen Center abbot and prolific author passed peacefully stemming from complications of a cardiac arrest he suffered in 2023.

An accomplished scholar and author, Lottermoser worked on the books Code of Conduct for Buddhist Nuns and A Critical Pali Dictionary.