The specific name, nguyenvansangi, is in honor of Vietnamese herpetologist Nguyen Van Sang.

[3] As of 2019, the genus Colubroelaps is monotypic, containing the sole species C.

[2] C. nguyenvansangi is found in southern Vietnam, in Bình Phước Province and Lâm Đồng Province.

The head is small, roundish, and short, and is not distinct from the body.

Ventrally, in striking contrast, it is uniform white.