DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I77 Other disorders of arteries and arterioles

  • Header · not billable

I77 is not billable. The category heads 23 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I70-I79 Diseases of arteries, arterioles and capillaries (I70-I79)
  3. I77 Other disorders of arteries and arterioles
Billable codes
23
Subdivisions
10
CC / MCC codes
3 / 9
HCC V28 codes
1
New FY2027
0
Index entries
100

Codes in I77

  1. I77.0
    Arteriovenous fistula, acquired
    Billable
    Inclusion terms 2, Excludes1 3, Excludes2 2

    Inclusion terms

    • Aneurysmal varix
    • Arteriovenous aneurysm, acquired

    Excludes1

    • arteriovenous aneurysm NOS (Q27.3-) Q27.3
    • presence of arteriovenous shunt (fistula) for dialysis (Z99.2) Z99.2
    • traumatic - see injury of blood vessel by body region

    Excludes2

  2. I77.1
    Stricture of artery
    Billable
    Inclusion terms 1

    Inclusion terms

    • Narrowing of artery
  3. I77.2
    Rupture of artery
    BillableCC
    Inclusion terms 3, Excludes1 1

    Inclusion terms

    • Erosion of artery
    • Fistula of artery
    • Ulcer of artery

    Excludes1

    • traumatic rupture of artery - see injury of blood vessel by body region
  4. I77.3
    Arterial fibromuscular dysplasia
    Billable
    Inclusion terms 2

    Inclusion terms

    • Fibromuscular hyperplasia (of) carotid artery
    • Fibromuscular hyperplasia (of) renal artery
  5. I77.4
    Celiac artery compression syndrome
    BillableCC
  6. I77.5
    Necrosis of artery
    BillableCC
  7. I77.6
    Arteritis, unspecified
    Billable
    Inclusion terms 2, Excludes1 8

    Inclusion terms

    • Aortitis NOS
    • Endarteritis NOS

    Excludes1

    • arteritis or endarteritis:
    • aortic arch (M31.4) M31.4
    • cerebral NEC (I67.7) I67.7
    • coronary (I25.89) I25.89
    • deformans (I70.-) I70
    • giant cell (M31.5, M31.6) M31.5 M31.6
    • obliterans (I70.-) I70
    • senile (I70.-) I70
  8. I77.7
    Other arterial dissection
    Header
    Excludes2 2

    Excludes2

    • dissection of aorta (I71.0-) I71.0
    • dissection of coronary artery (I25.42) I25.42
  9. I77.70
    Dissection of unspecified artery
    BillableMCC
  10. I77.71
    Dissection of carotid artery
    BillableMCC
  11. I77.72
    Dissection of iliac artery
    BillableMCC
  12. I77.73
    Dissection of renal artery
    BillableMCC
  13. I77.74
    Dissection of vertebral artery
    BillableMCC
    Excludes2 1

    Excludes2

    • aneurysm of vertebral artery (I72.6) I72.6
  14. I77.75
    Dissection of other precerebral arteries
    BillableMCC
    Inclusion terms 1, Excludes2 5

    Inclusion terms

    • Dissection of basilar artery (trunk)

    Excludes2

    • aneurysm of carotid artery (I72.0) I72.0
    • aneurysm of other precerebral arteries (I72.5) I72.5
    • aneurysm of vertebral artery (I72.6) I72.6
    • dissection of carotid artery (I77.71) I77.71
    • dissection of vertebral artery (I77.74) I77.74
  15. I77.76
    Dissection of artery of upper extremity
    BillableMCC
  16. I77.77
    Dissection of artery of lower extremity
    BillableMCC
  17. I77.79
    Dissection of other specified artery
    BillableMCC
  18. I77.8
    Other specified disorders of arteries and arterioles
    Header
  19. I77.81
    Aortic ectasia
    Header
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Ectasis aorta

    Excludes1

    • aortic aneurysm and dissection (I71.-) I71
  20. I77.810
    Thoracic aortic ectasia
    Billable
  21. I77.811
    Abdominal aortic ectasia
    Billable
  22. I77.812
    Thoracoabdominal aortic ectasia
    Billable
  23. I77.819
    Aortic ectasia, unspecified site
    Billable
  24. I77.82
    Antineutrophilic cytoplasmic antibody [ANCA] vasculitis
    Billable93
    Inclusion terms 2, Excludes2 3

    Inclusion terms

    • ANCA associated vasculitis
    • ANCA positive vasculitis

    Excludes2

    • eosinophilic granulomatosis with polyangiitis (M30.1) M30.1
    • granulomatosis with polyangiitis (M31.3-) M31.3
    • microscopic polyangiitis (M31.7) M31.7
  25. I77.89
    Other specified disorders of arteries and arterioles
    Billable
  26. I77.9
    Disorder of arteries and arterioles, 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 I77

Excludes2

  • collagen (vascular) diseases (M30-M36) M30 M36
  • hypersensitivity angiitis (M31.0) M31.0
  • pulmonary artery (I28.-) I28

Notes that also apply

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

Index entries

  • Marable's syndrome (celiac artery compression) → I77.4
  • Angiitis → I77.6
  • Aortitis (nonsyphilitic) (calcific) → I77.6
  • Arteriolitis → I77.6
  • Arteritis → I77.6
  • Endarteritis (bacterial, subacute) (infective) → I77.6
  • Vasculitis → I77.6
  • Degos' disease → I77.89
  • Arteriopathy → I77.9
  • Fistula (cutaneous)arteriovenous (acquired) (nonruptured) → I77.0
  • Varicoseaneurysm (ruptured) → I77.0
  • Varix (lower limb)aneurysmal → I77.0
  • Compressionartery → I77.1
  • Disease, diseasedobliterative vascular → I77.1
  • Insufficiency, insufficientarterial → I77.1
  • Kink, kinkingartery → I77.1
  • Narrowingartery → I77.1
  • Obliterationartery → I77.1
  • Obliterationdisease, arteriolar → I77.1
  • Stenosis, stenotic (cicatricial)artery NEC → I77.1
  • Strictureartery → I77.1
  • Torsionaorta, acquired → I77.1
  • Tortuousartery → I77.1
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)atheromatous → I77.2
  • Arteritissuppurative → I77.2
  • Erosionartery → I77.2
  • Fistula (cutaneous)aorta-duodenal → I77.2
  • Fistula (cutaneous)artery → I77.2
  • Rupture, rupturedartery → I77.2
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativeartery → I77.2
  • Dysplasiaarterial, fibromuscular → I77.3
  • Hyperplasia, hyperplasticartery, fibromuscular → I77.3
  • Hyperplasia, hyperplasticfibromuscular of artery (carotid) (renal) → I77.3
  • Celiacartery compression syndrome → I77.4
  • Compressionceliac (artery) (axis) → I77.4
  • Medianarcuate ligament syndrome → I77.4
  • Syndromearcuate ligament → I77.4
  • SyndromeMarable's → I77.4
  • Syndromemedian arcuate ligament → I77.4
  • Arteriolitisnecrotizing, kidney → I77.5

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

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

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