Q28.3

Other malformations of cerebral vessels

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 7 never code together

Q28code

Excludes1

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

Excludes2

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

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 3

Q28.3code

Inclusion terms

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

Index entries leading here 10

Aberrant (congenital) — see also Malposition, congenital
- vein (peripheral) NEC Q27.8
  - cerebral Q28.3
- artery (peripheral) Q27.8
  - cerebral Q28.3
Absence (of) (organ or part) (complete or partial)
- artery (congenital) (peripheral) Q27.8
  - brain Q28.3
- vein (peripheral) congenital NEC Q27.8
  - cerebral Q28.3
Agenesis
- artery (peripheral) Q27.9
  - brain Q28.3
- vein (s) (peripheral) Q27.9
  - brain Q28.3
Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) I72.9
- brain I67.1
  - congenital Q28.3
- cavernous sinus I67.1
  - arteriovenous (congenital) (nonruptured) Q28.3
- circle of Willis I67.1
  - congenital Q28.3
- congenital (peripheral) Q27.8
  - brain Q28.3
Angioma — see also Hemangioma, by site
- venous Q28.3
Anomaly, anomalous (congenital) (unspecified type) Q89.9
- brain (multiple) Q04.9
  - vessel Q28.3
- artery (peripheral) Q27.9
  - cerebral Q28.3
- cerebral Q04.9
  - vessels Q28.3
- vascular Q27.9
  - brain Q28.3
- vein (s) (peripheral) Q27.9
  - brain Q28.3
  - cerebral Q28.3
  - developmental Q28.3
Stricture — see also Stenosis
- artery I77.1
  - congenital (peripheral) Q27.8
    - cerebral Q28.3
Atresia, atretic
- artery NEC Q27.8
  - cerebral Q28.3
- vascular NEC Q27.8
  - cerebral Q28.3
Hypoplasia, hypoplastic
- artery (peripheral) Q27.8
  - brain (congenital) Q28.3
- vascular NEC peripheral Q27.8
  - brain Q28.3
- vein (s) (peripheral) Q27.8
  - brain Q28.3
Malformation (congenital) — see also Anomaly
- cerebral Q04.9
  - vessels Q28.3

Alongside this code 5 same parent — Q28

Q28.0 Arteriovenous malformation of precerebral vessels Q28.1 Other malformations of precerebral vessels Q28.2 Arteriovenous malformation of cerebral vessels Q28.8 Oth congenital malformations of circulatory system Q28.9 Congenital malformation of circulatory system, unspecified

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: Q28
Block: Q20-Q28
Siblings: 5

Present FY2024–FY2027.