Yes, Berry is a berry: it is consumed when it triggers.

Berry

(Gen 2) Restores 10 HP when at 1/2 max HP or less. Single use.

Frequently asked questions

What is Berry for?: (Gen 2) Restores 10 HP when at 1/2 max HP or less. Single use.
Is Berry a berry?: Yes, Berry is a berry: it is consumed when it triggers.