DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I67 Other cerebrovascular diseases

  • Header · not billable

I67 is not billable. The category heads 17 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

  • Moyamoya disease → I67.5
  • Klippel's disease → I67.2
  • Binswanger's disease → I67.3

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I60-I69 Cerebrovascular diseases (I60-I69)
  3. I67 Other cerebrovascular diseases
Billable codes
17
Subdivisions
10
CC / MCC codes
12 / 2
HCC V28 codes
1
New FY2027
0
Index entries
108

Codes in I67

  1. I67.0
    Dissection of cerebral arteries, nonruptured
    BillableMCC
    Excludes1 1

    Excludes1

    • ruptured cerebral arteries (I60.7) I60.7
  2. I67.1
    Cerebral aneurysm, nonruptured
    Billable
    Inclusion terms 4, Excludes1 2

    Inclusion terms

    • Cerebral aneurysm NOS
    • Cerebral arteriovenous fistula, acquired
    • Internal carotid artery aneurysm, intracranial portion
    • Internal carotid artery aneurysm, NOS

    Excludes1

    • congenital cerebral aneurysm, nonruptured (Q28.-) Q28
    • ruptured cerebral aneurysm (I60.7) I60.7
  3. I67.2
    Cerebral atherosclerosis
    Billable
    Inclusion terms 1

    Inclusion terms

    • Atheroma of cerebral and precerebral arteries
  4. I67.3
    Progressive vascular leukoencephalopathy
    BillableCC127
    Inclusion terms 1

    Inclusion terms

    • Binswanger's disease
  5. I67.4
    Hypertensive encephalopathy
    BillableCC
    Excludes2 1, Code also 5

    Excludes2

    • insufficiency, NOS, of precerebral arteries (G45.2) G45.2

    Code also

    • , if applicable, associated hypertensive conditions such as:
    • essential (primary) hypertension (I10) I10
    • hypertensive chronic kidney disease (I12.-) I12
    • hypertensive heart and chronic kidney disease (I13.-) I13
    • hypertensive heart disease (I11.-) I11
  6. I67.5
    Moyamoya disease
    BillableCC
  7. I67.6
    Nonpyogenic thrombosis of intracranial venous system
    BillableCC
    Inclusion terms 2, Excludes1 1

    Inclusion terms

    • Nonpyogenic thrombosis of cerebral vein
    • Nonpyogenic thrombosis of intracranial venous sinus

    Excludes1

    • nonpyogenic thrombosis of intracranial venous system causing infarction (I63.6) I63.6
  8. I67.7
    Cerebral arteritis, not elsewhere classified
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Granulomatous angiitis of the nervous system

    Excludes1

    • allergic granulomatous angiitis (M30.1) M30.1
  9. I67.8
    Other specified cerebrovascular diseases
    Header
  10. I67.81
    Acute cerebrovascular insufficiency
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Acute cerebrovascular insufficiency unspecified as to location or reversibility
  11. I67.82
    Cerebral ischemia
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Chronic cerebral ischemia
  12. I67.83
    Posterior reversible encephalopathy syndrome
    BillableMCC
    Inclusion terms 1

    Inclusion terms

    • PRES
  13. I67.84
    Cerebral vasospasm and vasoconstriction
    Header
  14. I67.841
    Reversible cerebrovascular vasoconstriction syndrome
    BillableCC
    Inclusion terms 1, Code first 1

    Inclusion terms

    • Call-Fleming syndrome

    Code first

    • underlying condition, if applicable, such as eclampsia (O15.00-O15.9) O15.00 O15.9
  15. I67.848
    Other cerebrovascular vasospasm and vasoconstriction
    BillableCC
  16. I67.85
    Hereditary cerebrovascular diseases
    Header
  17. I67.850
    Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
    BillableCC
    Inclusion terms 1, Code also 4

    Inclusion terms

    • CADASIL

    Code also

    • any associated diagnoses, such as:
    • epilepsy (G40.-) G40
    • stroke (I63.-) I63
    • vascular dementia (F01.-) F01
  18. I67.858
    Other hereditary cerebrovascular disease
    BillableCC
  19. I67.89
    Other cerebrovascular disease
    BillableCC
  20. I67.9
    Cerebrovascular disease, unspecified
    Billable

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 I67

Excludes1

  • Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5-) I63.3 I63.5
  • Occlusion and stenosis of precerebral artery causing cerebral infarction (I63.2-) I63.2

Excludes2

  • sequelae of the listed conditions (I69.8) I69.8

Notes that also apply

Block I60-I69 instructions (Excludes1 1, Use additional code 8): printed on the block page.

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Index entries

  • Klippel's disease → I67.2
  • Binswanger's disease → I67.3
  • Encephaloduroarteriomyosynangiosis (EDAMS) → I67.5
  • Moyamoya disease → I67.5
  • Nishimoto (-Takeuchi) disease → I67.5
  • Leukoaraiosis (hypertensive) → I67.81
  • Apoplectiform convulsions (cerebral ischemia) → I67.82
  • PRES (posterior reversible encephalopathy syndrome) → I67.83
  • CADASIL (cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy) → I67.850
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)berry (congenital) (nonruptured) → I67.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)brain → I67.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)cavernous sinus → I67.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)circle of Willis → I67.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)miliary (congenital) → I67.1
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)brain → I67.2
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)central nervous system → I67.2
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)cerebral → I67.2
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)cerebrovascular → I67.2
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)vertebral (artery) → I67.2
  • Atheroma, atheromatousbasilar (artery) → I67.2
  • Atheroma, atheromatouscarotid (artery) (common) (internal) → I67.2
  • Atheroma, atheromatouscerebral (arteries) → I67.2
  • Atheroma, atheromatousvertebral (artery) → I67.2
  • Encephalopathy (acute)arteriosclerotic → I67.2
  • Sclerosis, scleroticcerebrovascular → I67.2
  • LeukoencephalopathyBinswanger's → I67.3
  • Leukoencephalopathyvascular, progressive → I67.3
  • Encephalopathy (acute)hypertensive → I67.4
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)encephalopathy → I67.4
  • Disease, diseasedmoyamoya → I67.5
  • Disease, diseasedNishimoto (-Takeuchi) → I67.5
  • Angiitisnervous system, granulomatous → I67.7
  • Arteritisbrain → I67.7
  • Arteritiscerebral → I67.7
  • Endarteritis (bacterial, subacute) (infective)brain → I67.7
  • Endarteritis (bacterial, subacute) (infective)cerebral or cerebrospinal → I67.7
  • Panarteritis nodosabrain or cerebral → I67.7
  • Insufficiency, insufficientcerebrovascular (acute) → I67.81
  • Convulsions (idiopathic)apoplectiform (cerebral ischemia) → I67.82
  • Ischemia, ischemiccerebral (chronic) (generalized) → I67.82

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

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

Hierarchy