Q28Other congenital malformations of circulatory system

Q28 is the ICD-10-CM diagnosis code for other congenital malformations of circulatory system. It belongs to block Q20-Q28 (congenital malformations of the circulatory system) 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 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q28.0 (vessels), Q28.1 (vessels), Q28.2 (vessels), Q28.3 (vessels), Q28.8 (system) and Q28.9 (unspecified).

Don't report Q28 together with the conditions in its Excludes1 note: congenital aneurysm NOS (Q27.8), congenital coronary aneurysm (Q24.5), ruptured cerebral arteriovenous malformation (I60.8) and ruptured malformation of precerebral vessels (I72.0).

The conditions in its Excludes2 note aren't part of Q28, but may be coded alongside it if the patient has both: congenital peripheral aneurysm (Q27.8), congenital pulmonary aneurysm (Q25.79) and congenital retinal aneurysm (Q14.1).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.