Código ICD10 del Síndrome de Klinefelter y código ICD9
Código CIE-10 y CIE-9 de Síndrome de Klinefelter, con detalles de clasificación para profesionales, codificadores y pacientes.
Original
Wikipedia says that there isn't a ICD9 code. Wikipedia also separates XXY from XYY saying the latter is not Klinefelter but my experience on help sites they are all included.