Q27Other congenital malformations of peripheral vascular system

Q27 is the ICD-10-CM diagnosis code for other congenital malformations of peripheral vascular 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 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q27.0 (artery), Q27.1 (stenosis), Q27.2 (artery), Q27.3 ((peripheral)), Q27.4 (phlebectasia), Q27.8 (system) and Q27.9 (unspecified).

The conditions in its Excludes2 note aren't part of Q27, but may be coded alongside it if the patient has both: anomalies of cerebral and precerebral vessels (Q28.0-Q28.3), anomalies of coronary vessels (Q24.5), anomalies of pulmonary artery (Q25.5-Q25.7), congenital retinal aneurysm (Q14.1) and 1 more.

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