Q89 - Other congenital malformations, not elsewhere classified
Q89.0 - Congenital absence and malformations of spleen
Excludes 1:
-isomerism of atrial appendages (with asplenia or polysplenia) Q20.6)
Q89.01 - Asplenia (congenital)
Q89.09 - Congenital malformations of spleen