Moderate intellectual disability (ID) is defined as a type of ID characterized by moderately sub-average adaptive functioning and intellectual functioning, with an intelligence quotient (IQ) the range of 35-49. The phenotype is Human Phenotype Ontology term HP_0002342 (Moderate intellectual disability). Also known as: IQ between 34 and 49, Intellectual disability, moderate, Mental retardation, moderate, Moderate mental deficiency, Moderate mental retardation.