A DNA code analyzer was a bio-scanner that read both the fundamental structure and the molecular physiology of a lifeform. (TOS: "The Immunity Syndrome"; VOY: "Distant Origin")

In effort to destroy a giant space amoeba, and free the trapped USS Enterprise, a specially equipped shuttlecraft was required to penetrate the cell to find a way to destroy the amoeba. A DNA code analyzer was among the special equipment taken on board the shuttle, by suggestion of Doctor McCoy. (TOS: "The Immunity Syndrome")