DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q28 Other congenital malformations of circulatory system

  • Header · not billable

Q28 is not billable. The category heads 6 billable codes in FY2027: the 6 codes directly below it.

Index → code

  • Pseudoarteriosus → Q28.8
  • Angiomavenous → Q28.3
  • Embryonicheart → Q28.9

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q20-Q28 Congenital malformations of the circulatory system (Q20-Q28)
  3. Q28 Other congenital malformations of circulatory system
Billable codes
6
Subdivisions
6
CC / MCC codes
4 / 2
HCC V28 codes
0
New FY2027
0
Index entries
65

Codes in Q28

  1. Q28.0
    Arteriovenous malformation of precerebral vessels
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Congenital arteriovenous precerebral aneurysm (nonruptured)
  2. Q28.1
    Other malformations of precerebral vessels
    BillableCCExempt
    Inclusion terms 2

    Inclusion terms

    • Congenital malformation of precerebral vessels NOS
    • Congenital precerebral aneurysm (nonruptured)
  3. Q28.2
    Arteriovenous malformation of cerebral vessels
    BillableMCCExempt
    Inclusion terms 2

    Inclusion terms

    • Arteriovenous malformation of brain NOS
    • Congenital arteriovenous cerebral aneurysm (nonruptured)
  4. Q28.3
    Other malformations of cerebral vessels
    BillableMCCExempt
    Inclusion terms 3

    Inclusion terms

    • Congenital cerebral aneurysm (nonruptured)
    • Congenital malformation of cerebral vessels NOS
    • Developmental venous anomaly
  5. Q28.8
    Other specified congenital malformations of circulatory system
    BillableCCExempt
    Inclusion terms 2, Excludes2 1

    Inclusion terms

    • Congenital aneurysm, specified site NEC
    • Spinal vessel anomaly

    Excludes2

    • disorders of pyrophosphate metabolism (E83.82-) E83.82
  6. Q28.9
    Congenital malformation of circulatory system, unspecified
    BillableCCExempt

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At Q28

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

Notes that also apply

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Pseudoarteriosus → Q28.8
  • Anomaly, anomalous (congenital) (unspecified type)precerebral vessel → Q28.1
  • Dissectionprecerebral artery, congenital (nonruptured) → Q28.1
  • Distribution vessel, atypicalprecerebral → Q28.1
  • Malformation (congenital)precerebral vessels → Q28.1
  • Angiomavenous → Q28.3
  • Absence (of) (organ or part) (complete or partial)ductus arteriosus → Q28.8
  • Agenesisductus arteriosus → Q28.8
  • Anomaly, anomalous (congenital) (unspecified type)cardiovascular system → Q28.8
  • Agenesiscirculatory system, part NOS → Q28.9
  • Anomaly, anomalous (congenital) (unspecified type)circulatory system → Q28.9
  • Circulationembryonic → Q28.9
  • Circulationheart, incomplete → Q28.9
  • Deformitycardiovascular system, congenital → Q28.9
  • Embryoniccirculation → Q28.9
  • Embryonicheart → Q28.9
  • Malformation (congenital)circulatory system → Q28.9
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)arteriovenous (congenital)precerebral vessels → Q28.0
  • Malformation (congenital)arteriovenous, aneurysmatic (congenital)precerebral vessels (nonruptured) → Q28.0
  • Aberrant (congenital)artery (peripheral)basilar NEC → Q28.1
  • Aberrant (congenital)artery (peripheral)precerebral → Q28.1
  • Aberrant (congenital)artery (peripheral)vertebral → Q28.1
  • Aberrant (congenital)vein (peripheral) NECprecerebral → Q28.1
  • Absence (of) (organ or part) (complete or partial)vein (peripheral) congenital NECprecerebral → Q28.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)precerebralcongenital (nonruptured) → Q28.1
  • Anomaly, anomalous (congenital) (unspecified type)artery (peripheral)basilar NEC → Q28.1
  • Anomaly, anomalous (congenital) (unspecified type)artery (peripheral)vertebral NEC → Q28.1
  • Anomaly, anomalous (congenital) (unspecified type)vessel(s)precerebral → Q28.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)arteriovenous (congenital)brain → Q28.2
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)brainarteriovenous (congenital) (nonruptured) → Q28.2
  • Malformation (congenital)arteriovenous, aneurysmatic (congenital)brain → Q28.2
  • Malformation (congenital)arteriovenous, aneurysmatic (congenital)cerebral → Q28.2
  • Malformation (congenital)brain (multiple)arteriovenous → Q28.2
  • Aberrant (congenital)artery (peripheral)cerebral → Q28.3
  • Aberrant (congenital)vein (peripheral) NECcerebral → Q28.3
  • Absence (of) (organ or part) (complete or partial)artery (congenital) (peripheral)brain → Q28.3
  • Absence (of) (organ or part) (complete or partial)vein (peripheral) congenital NECcerebral → Q28.3
  • Agenesisartery (peripheral)brain → Q28.3
  • Agenesisvein(s) (peripheral)brain → Q28.3
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)braincongenital → Q28.3

25 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy