Hypocalcemic rickets is a group of genetic diseases characterized by hypocalcemia and rickets. It comprises hypocalcemic vitamin D dependent rickets (VDDR-I) and hypocalcemic vitamin D resistant rickets (HVDRR). The disease is hypocalcemic rickets (MONDO_0017323, a Monarch Disease Ontology id). Also known as: Calciopenic rickets, calcium deficiency rickets.