Q28.3 Other malformations of cerebral vessels

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Applicable to

• Congenital cerebral aneurysm (nonruptured)
• Congenital malformation of cerebral vessels NOS
• Developmental venous anomaly

Applies from Q28 Other congenital malformations of circulatory system

Excludes1 (never code together)

• congenital aneurysm NOS (Q27.8)
• congenital coronary aneurysm (Q24.5)
• ruptured cerebral arteriovenous malformation (I60.8)
• ruptured malformation of precerebral vessels (I72.0)

Excludes2 (not included here)

• congenital peripheral aneurysm (Q27.8)
• congenital pulmonary aneurysm (Q25.79)
• congenital retinal aneurysm (Q14.1)

MS-DRG index

Defines the logic of DRG(s) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 747.81 Anomalies of cerebrovascular system (approximate)

Code annotations containing back-references to Q28.3

Back-references to Q28.3

• Type 2 Excludes: Q27 Other congenital malformations of peripheral vascular system ("anomalies of cerebral and precerebral vessels (Q28.0-Q28.3)")

Back-references to Q28

• Code Also: I27.21 Secondary pulmonary arterial hypertension ("congenital heart disease (Q20-Q28)")
• Type 1 Excludes: I67.1 Cerebral aneurysm, nonruptured ("congenital cerebral aneurysm, nonruptured (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 Q28.3

• Aberrant (congenital) › artery (peripheral) › cerebral
• Aberrant (congenital) › vein (peripheral) NEC › cerebral
• Absence (of) (organ or part) (complete or partial) › artery (congenital) (peripheral) › brain
• Absence (of) (organ or part) (complete or partial) › vein (peripheral) congenital NEC › cerebral
• Agenesis › artery (peripheral) › brain
• Agenesis › vein (s) (peripheral) › brain
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › congenital
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › cavernous sinus › arteriovenous (congenital) (nonruptured)
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › circle of Willis › congenital
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › congenital (peripheral) › brain
• Angioma › venous
• Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral) › cerebral
• Anomaly, anomalous (congenital) (unspecified type) › brain (multiple) › vessel
• Anomaly, anomalous (congenital) (unspecified type) › cerebral › vessels
• Anomaly, anomalous (congenital) (unspecified type) › vascular › brain
• Anomaly, anomalous (congenital) (unspecified type) › vein (s) (peripheral) › brain
• Anomaly, anomalous (congenital) (unspecified type) › vein (s) (peripheral) › cerebral
• Anomaly, anomalous (congenital) (unspecified type) › vein (s) (peripheral) › developmental
• Atresia, atretic › artery NEC › cerebral
• Atresia, atretic › vascular NEC › cerebral
• Hypoplasia, hypoplastic › artery (peripheral) › brain (congenital)
• Hypoplasia, hypoplastic › vascular NEC peripheral › brain
• Hypoplasia, hypoplastic › vein (s) (peripheral) › brain
• Malformation (congenital) › cerebral › vessels
• Stricture › artery › congenital (peripheral) › cerebral

Nearby codes

• Q28 Other congenital malformations of circulatory system
• Q28.0 Arteriovenous malformation of precerebral vessels
• Q28.1 Other malformations of precerebral vessels
• Q28.2 Arteriovenous malformation of cerebral vessels
• Q28.3 Other malformations of cerebral vessels (this code)
• Q28.8 Other specified congenital malformations of circulatory system
• Q28.9 Congenital malformation of circulatory system, unspecified