CYP2D6*96 is assigned no function based on limited evidence. Multiple in vitro studies found CYP2D6*96 had nondetectable enzyme with various substrates (25469868, 26310775, 26666748, 26544071, 26406933, 27109434, 27097346, 27016952, 26542054, 26937172, 26968424, 27203132, 27251229, 27354764, 27538917). CYP2D6*96 is defined by an early stop codon yielding a truncated nonfunctional protein. Therefore, consensus among experts was no function with an activity value of 0 based on limited evidence.