The simple virilizing form of classical congenital adrenal hyperplasia due to 21-hydroxylase deficiency (classical 21 OHD CAH) is characterized by genital ambiguity and virilization of the external genitalia in females, hypocortisolism and precocious pseudopuberty without salt-wasting. The disease is classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency, simple virilizing form (MONDO_0017840, a Monarch Disease Ontology entry). Also known as: classic 21-OHD CAH, simple virilizing form.