ICD-10-CM>Q00-QA1>Q20-Q28>Q21>Q21.8Q21.8Other congenital malformations of cardiac septaBillable/Specific Copy Code Copy DescriptionApplicable ToEisenmenger's defectPentalogy of FallotCode Also, if applicable:Eisenmenger's complex (I27.83)Eisenmenger's syndrome (I27.83)