Q89.8Other specified congenital malformations

Q89.8 is the ICD-10-CM diagnosis code for other specified congenital malformations. It belongs to category Q89 (other congenital malformations, not elsewhere classified), block Q80-Q89 (other congenital malformations) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within Q89, choose Q89.8 (Other specified congenital malformations) only when documentation doesn't support a more specific option: congenital absence and malformations of spleen (Q89.0), congenital malformations of adrenal gland (Q89.1), congenital malformations of other endocrine glands (Q89.2), Situs inversus (Q89.3), conjoined twins (Q89.4), multiple congenital malformations, not elsewhere classified (Q89.7) and congenital malformation, unspecified (Q89.9).

To report this condition, pick the subcode that matches the documentation: Q89.81 (syndrome) and Q89.89 (malformations).

Use an additional code(s) to identify all associated manifestations.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2026 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 759.89 (other specified congenital anomalies).