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Q28.3

Q28.3: Other malformations of cerebral vessels

Billable / specific codeICD-10-CMPOA exempt

Q28.3 is a billable, specific ICD-10-CM code for other malformations of cerebral vessels. It is valid for submission on a claim.

Check Q28.3 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Excludes1 inherited from the categories above Q28.3

A category’s note binds every code beneath it.

Written on Q28: Other congenital malformations of circulatory system

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

Excludes2 inherited from the categories above Q28.3

Not part of this code, but both may be coded when both are present.

Written on Q28: Other congenital malformations of circulatory system

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

Other codes that can never be billed with Q28.3

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • I67.1Cerebral aneurysm, nonruptured

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Q28.3 is named in 22 Medicare coverage policies: 22 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
  • A55315Billing and Coding: Proton Beam Therapy
  • A56612Billing and Coding: CT of the Head

Alphabetic index entries that lead here

  • Angioma›venous
  • Aberrant›artery›cerebral
  • Aberrant›vein NEC›cerebral
  • Absence›artery›brain
  • Absence›vein congenital NEC›cerebral
  • Agenesis›artery›brain
  • Agenesis›vein›brain
  • Aneurysm›brain›congenital
  • Aneurysm›cavernous sinus›arteriovenous(congenital) (nonruptured)
  • Aneurysm›circle of Willis›congenital
  • Aneurysm›congenital›brain
  • Anomaly, anomalous›artery›cerebral

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q28

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.