Q28.1

Other malformations of precerebral vessels

Billable / specificPOA exempt

Q28.1 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Congenital malformation of precerebral vessels NOS
  • Congenital precerebral aneurysm (nonruptured)

Includes (from Q28)

  • Note: Codes from this chapter are not for use on maternal records

Excludes1

Not coded here — never report together with this code.

  • congenital aneurysm NOS (Q27.8) (from Q28)
  • congenital coronary aneurysm (Q24.5) (from Q28)
  • ruptured cerebral arteriovenous malformation (I60.8) (from Q28)
  • ruptured malformation of precerebral vessels (I72.0) (from Q28)

Excludes2

Not included here — may be reported together when both conditions exist.

  • inborn errors of metabolism (E70-E88) (from Q28)
  • congenital peripheral aneurysm (Q27.8) (from Q28)
  • congenital pulmonary aneurysm (Q25.79) (from Q28)
  • congenital retinal aneurysm (Q14.1) (from Q28)

Also known as

  • Congenital malformation of precerebral vessels NOS
  • Congenital precerebral aneurysm (nonruptured)
  • Aberrant, artery, basilar NEC
  • Aberrant, artery, precerebral
  • Aberrant, artery, vertebral
  • Aberrant, veinNEC, precerebral
  • Absence, veincongenital NEC, precerebral
  • Aneurysm, precerebral, congenital
  • Anomaly, anomalous, artery, basilar NEC
  • Anomaly, anomalous, artery, vertebral NEC
  • Anomaly, anomalous, precerebral vessel
  • Anomaly, anomalous, vessel, precerebral
  • Dissection, artery, precerebral, congenital
  • Dissection, precerebral artery, congenital
  • Distribution vessel, atypical, precerebral
  • Malformation, precerebral vessels

Parent code

  • Q28Other congenital malformations of circulatory systemHeader

Related codes

  • Q28.0Arteriovenous malformation of precerebral vesselsBillable
  • Q28.2Arteriovenous malformation of cerebral vesselsBillable
  • Q28.3Other malformations of cerebral vesselsBillable
  • Q28.8Other specified congenital malformations of circulatory systemBillable
  • Q28.9Congenital malformation of circulatory system, unspecifiedBillable

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