Q27.9 Congenital malformation of peripheral vascular system, unspecified

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Anomaly of artery or vein NOS

Applies from Q27 Other congenital malformations of peripheral vascular system

Excludes2 (not included here)

• 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)
• hemangioma and lymphangioma (D18.-)

MS-DRG index

Defines the logic of DRG(s) 299-301 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 747.60 Anomaly of the peripheral vascular system, unspecified site (approximate)

Code annotations containing back-references to Q27.9

Back-references to Q27

• Code Also: I27.21 Secondary pulmonary arterial hypertension ("congenital heart disease (Q20-Q28)")
• Type 2 Excludes: P29 Cardiovascular disorders originating in the perinatal period ("congenital malformations of the circulatory system (Q20-Q28)")
• Code Also: Z71.87 Encounter for pediatric-to-adult transition counseling ("congenital malformations of the circulatory system (Q20-Q28)")

Diagnosis Index entries for Q27.9

• Accessory (congenital) › blood vessels NEC
• Agenesis › artery (peripheral)
• Agenesis › vein (s) (peripheral)
• Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral)
• Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral) › peripheral
• Anomaly, anomalous (congenital) (unspecified type) › capillary
• Anomaly, anomalous (congenital) (unspecified type) › peripheral vascular system
• Anomaly, anomalous (congenital) (unspecified type) › vascular
• Anomaly, anomalous (congenital) (unspecified type) › vein (s) (peripheral)
• Anomaly, anomalous (congenital) (unspecified type) › vessel (s)
• Defect, defective › vascular (local) › congenital
• Deformity › artery (congenital) (peripheral) NOS
• Deformity › vein (congenital)
• Distribution vessel, atypical
• Malformation (congenital) › peripheral vascular system
• Malformation (congenital) › vascular system, peripheral

Nearby codes

• Q27.33 Arteriovenous malformation of digestive system vessel
• Q27.34 Arteriovenous malformation of renal vessel
• Q27.39 Arteriovenous malformation, other site
• Q27.4 Congenital phlebectasia
• Q27.8 Other specified congenital malformations of peripheral vascular system
• Q27.9 Congenital malformation of peripheral vascular system, unspecified (this code)