Any non-syndromic X-linked intellectual disability in which the cause of the disease is a mutation in the KIF4A gene. The disease is MONDO_0010488 (intellectual disability, X-linked 100). Also known as: KIF4A non-syndromic X-linked intellectual disability, intellectual developmental disorder, X-linked 100, X-linked recessive, intellectual disability, X-linked type 100, mental retardation, X-linked type 100, non-syndromic X-linked intellectual disability caused by mutation in KIF4A.