CYP21A, or Cytochrome P450 family 21 subfamily A member 1, pseudogene, is a human gene encoded by CYP21A1P. It may also be known as: cytochrome P450 family 21 subfamily A member 1, pseudogene; CYP21P; P450c21A; cytochrome P450, family 21, subfamily A, polypeptide 1 pseudogene.