DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I25 Chronic ischemic heart disease

  • Header · not billable

I25 is not billable. The category heads 56 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

  • Old (previous) myocardial infarction → I25.2
  • Arteritiscoronary (artery) → I25.89
  • Plaque(s)coronary, lipid rich → I25.83

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I20-I25 Ischemic heart diseases (I20-I25)
  3. I25 Chronic ischemic heart disease
Billable codes
56
Subdivisions
9
CC / MCC codes
38 / 1
HCC V28 codes
8
New FY2027
0
Index entries
116

Codes in I25

  1. I25.1
    Atherosclerotic heart disease of native coronary artery
    Header
    Inclusion terms 5, Excludes2 2, Use additional code 3

    Inclusion terms

    • Atherosclerotic cardiovascular disease
    • Coronary (artery) atheroma
    • Coronary (artery) atherosclerosis
    • Coronary (artery) disease
    • Coronary (artery) sclerosis

    Excludes2

    • atheroembolism (I75.-) I75
    • atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-) I25.7

    Use additional code

    • code, if applicable, to identify:
    • coronary atherosclerosis due to calcified coronary lesion (I25.84) I25.84
    • coronary atherosclerosis due to lipid rich plaque (I25.83) I25.83
  2. I25.10
    Atherosclerotic heart disease of native coronary artery without angina pectoris
    Billable
    Inclusion terms 1

    Inclusion terms

    • Atherosclerotic heart disease NOS
  3. I25.11
    Atherosclerotic heart disease of native coronary artery with angina pectoris
    Header
  4. I25.110
    Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
    BillableCC229
    Excludes1 1

    Excludes1

    • unstable angina without atherosclerotic heart disease (I20.0) I20.0
  5. I25.111
    Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
    Billable
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerotic heart disease (I20.1) I20.1
  6. I25.112
    Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
    BillableCC
  7. I25.118
    Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
    Billable
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerotic heart disease (I20.8-) I20.8
  8. I25.119
    Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
    Billable
    Inclusion terms 2, Excludes1 1

    Inclusion terms

    • Atherosclerotic heart disease with angina NOS
    • Atherosclerotic heart disease with ischemic chest pain

    Excludes1

    • unspecified angina pectoris without atherosclerotic heart disease (I20.9) I20.9
  9. I25.2
    Old myocardial infarction
    BillableExempt
    Inclusion terms 2

    Inclusion terms

    • Healed myocardial infarction
    • Past myocardial infarction diagnosed by ECG or other investigation, but currently presenting no symptoms
  10. I25.3
    Aneurysm of heart
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Mural aneurysm
    • Ventricular aneurysm
  11. I25.4
    Coronary artery aneurysm and dissection
    Header
  12. I25.41
    Coronary artery aneurysm
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Coronary arteriovenous fistula, acquired

    Excludes1

    • congenital coronary (artery) aneurysm (Q24.5) Q24.5
  13. I25.42
    Coronary artery dissection
    BillableMCC
  14. I25.5
    Ischemic cardiomyopathy
    Billable
    Excludes2 1

    Excludes2

    • coronary atherosclerosis (I25.1-, I25.7-) I25.1 I25.7
  15. I25.6
    Silent myocardial ischemia
    Billable
  16. I25.7
    Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
    Header
    Excludes1 3, Use additional code 3

    Excludes1

    • atherosclerosis of bypass graft(s) of transplanted heart without angina pectoris (I25.812) I25.812
    • atherosclerosis of coronary artery bypass graft(s) without angina pectoris (I25.810) I25.810
    • atherosclerosis of native coronary artery of transplanted heart without angina pectoris (I25.811) I25.811

    Use additional code

    • code, if applicable, to identify:
    • coronary atherosclerosis due to calcified coronary lesion (I25.84) I25.84
    • coronary atherosclerosis due to lipid rich plaque (I25.83) I25.83
  17. I25.70
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris
    Header
  18. I25.700
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris
    BillableCC229
    Excludes1 1

    Excludes1

    • unstable angina pectoris without atherosclerosis of coronary artery bypass graft (I20.0) I20.0
  19. I25.701
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
    Billable
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerosis of coronary artery bypass graft (I20.1) I20.1
  20. I25.702
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris
    BillableCC
  21. I25.708
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris
    Billable
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerosis of coronary artery bypass graft (I20.8-) I20.8
  22. I25.709
    Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris
    Billable
    Excludes1 1

    Excludes1

    • unspecified angina pectoris without atherosclerosis of coronary artery bypass graft (I20.9) I20.9
  23. I25.71
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris
    Header
  24. I25.710
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
    BillableCC229
    Excludes1 1, Excludes2 1

    Excludes1

    • unstable angina without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.0) I20.0

    Excludes2

    • embolism or thrombus of coronary artery bypass graft(s) (T82.8-) T82.8
  25. I25.711
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
    BillableCC
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.1) I20.1
  26. I25.712
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris
    BillableCC
  27. I25.718
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.8-) I20.8
  28. I25.719
    Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • unspecified angina pectoris without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.9) I20.9
  29. I25.72
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris
    Header
    Inclusion terms 1

    Inclusion terms

    • Atherosclerosis of internal mammary artery graft with angina pectoris
  30. I25.720
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris
    BillableCC229
    Excludes1 1

    Excludes1

    • unstable angina without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.0) I20.0
  31. I25.721
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
    BillableCC
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.1) I20.1
  32. I25.722
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris
    BillableCC
  33. I25.728
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.8-) I20.8
  34. I25.729
    Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • unspecified angina pectoris without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.9) I20.9
  35. I25.73
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris
    Header
  36. I25.730
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
    BillableCC229
    Excludes1 1

    Excludes1

    • unstable angina without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.0) I20.0
  37. I25.731
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
    BillableCC
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.1) I20.1
  38. I25.732
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris
    BillableCC
  39. I25.738
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.8-) I20.8
  40. I25.739
    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • unspecified angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.9) I20.9
  41. I25.75
    Atherosclerosis of native coronary artery of transplanted heart with angina pectoris
    Header
    Excludes1 1

    Excludes1

    • atherosclerosis of native coronary artery of transplanted heart without angina pectoris (I25.811) I25.811
  42. I25.750
    Atherosclerosis of native coronary artery of transplanted heart with unstable angina
    BillableCC229
  43. I25.751
    Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm
    BillableCC
  44. I25.752
    Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris
    BillableCC
  45. I25.758
    Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris
    BillableCC
  46. I25.759
    Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris
    BillableCC
  47. I25.76
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris
    Header
    Excludes1 1

    Excludes1

    • atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris (I25.812) I25.812
  48. I25.760
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina
    BillableCC229
  49. I25.761
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm
    BillableCC
  50. I25.762
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris
    BillableCC
  51. I25.768
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris
    BillableCC
  52. I25.769
    Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris
    BillableCC
  53. I25.79
    Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris
    Header
  54. I25.790
    Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
    BillableCC229
    Excludes1 1

    Excludes1

    • unstable angina without atherosclerosis of other coronary artery bypass graft(s) (I20.0) I20.0
  55. I25.791
    Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm
    BillableCC
    Excludes1 1

    Excludes1

    • angina pectoris with documented spasm without atherosclerosis of other coronary artery bypass graft(s) (I20.1) I20.1
  56. I25.792
    Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris
    BillableCC
  57. I25.798
    Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • other forms of angina pectoris without atherosclerosis of other coronary artery bypass graft(s) (I20.8-) I20.8
  58. I25.799
    Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
    BillableCC
    Excludes1 1

    Excludes1

    • unspecified angina pectoris without atherosclerosis of other coronary artery bypass graft(s) (I20.9) I20.9
  59. I25.8
    Other forms of chronic ischemic heart disease
    Header
  60. I25.81
    Atherosclerosis of other coronary vessels without angina pectoris
    Header
    Excludes2 1, Use additional code 3

    Excludes2

    • atherosclerotic heart disease of native coronary artery without angina pectoris (I25.10) I25.10

    Use additional code

    • code, if applicable, to identify:
    • coronary atherosclerosis due to calcified coronary lesion (I25.84) I25.84
    • coronary atherosclerosis due to lipid rich plaque (I25.83) I25.83
  61. I25.810
    Atherosclerosis of coronary artery bypass graft(s) without angina pectoris
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Atherosclerosis of coronary artery bypass graft NOS

    Excludes1

    • atherosclerosis of coronary bypass graft(s) with angina pectoris (I25.70-I25.73-, I25.79-) I25.70 I25.73 I25.79
  62. I25.811
    Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Atherosclerosis of native coronary artery of transplanted heart NOS

    Excludes1

    • atherosclerosis of native coronary artery of transplanted heart with angina pectoris (I25.75-) I25.75
  63. I25.812
    Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Atherosclerosis of bypass graft of transplanted heart NOS

    Excludes1

    • atherosclerosis of bypass graft of transplanted heart with angina pectoris (I25.76) I25.76
  64. I25.82
    Chronic total occlusion of coronary artery
    Billable
    Inclusion terms 2, Excludes1 2, Code first 1

    Inclusion terms

    • Complete occlusion of coronary artery
    • Total occlusion of coronary artery

    Excludes1

    • acute coronary occlusion with myocardial infarction (I21.0-I21.B, I22.-) I21.0 I21.B I22
    • acute coronary occlusion without myocardial infarction (I24.0) I24.0

    Code first

  65. I25.83
    Coronary atherosclerosis due to lipid rich plaque
    Billable
    Code first 1

    Code first

  66. I25.84
    Coronary atherosclerosis due to calcified coronary lesion
    Billable
    Inclusion terms 1, Code first 1

    Inclusion terms

    • Coronary atherosclerosis due to severely calcified coronary lesion

    Code first

  67. I25.85
    Chronic coronary microvascular dysfunction
    Billable
    Inclusion terms 2

    Inclusion terms

    • Chronic (presentation of) coronary microvascular disease
    • Coronary microvascular dysfunction NOS
  68. I25.89
    Other forms of chronic ischemic heart disease
    Billable
  69. I25.9
    Chronic ischemic heart disease, unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Ischemic heart disease (chronic) NOS

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 I25

Excludes2

  • non-ischemic myocardial injury (I5A) I5A

Use additional code

  • code to identify:
  • chronic total occlusion of coronary artery (I25.82) I25.82
  • exposure to environmental tobacco smoke (Z77.22) Z77.22
  • history of tobacco dependence (Z87.891) Z87.891
  • occupational exposure to environmental tobacco smoke (Z57.31) Z57.31
  • tobacco dependence (F17.-) F17
  • tobacco use (Z72.0) Z72.0

Notes that also apply

Block I20-I25 instructions (Code also 1): printed on the block page.

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

Index entries

  • Old (previous) myocardial infarction → I25.2
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)coronary (artery) → I25.10
  • Atheroma, atheromatouscoronary (artery) → I25.10
  • Disease, diseasedcardiovascular (atherosclerotic) → I25.10
  • Sclerosis, scleroticcoronary (artery) → I25.10
  • Scar, scarringmyocardium, myocardial → I25.2
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)cardiac (false) → I25.3
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)heart (wall) (chronic or with a stated duration of over 4 weeks) → I25.3
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)coronary (arteriosclerotic) (artery) → I25.41
  • Fistula (cutaneous)coronary, arteriovenous → I25.41
  • Cardiomyopathy (familial) (idiopathic)ischemic → I25.5
  • Ischemia, ischemiccardiomyopathy → I25.5
  • Atherosclerosistransplanted heart → I25.811
  • Plaque(s)coronary, lipid rich → I25.83
  • Plaque(s)lipid rich, coronary → I25.83
  • Dysfunctioncoronary microvascular → I25.85
  • Arteritiscoronary (artery) → I25.89
  • Deformitycoronary artery (acquired) → I25.9
  • Ischemia, ischemicheart (chronic or with a stated duration of over 4 weeks) → I25.9
  • Ischemia, ischemicmyocardium, myocardial (chronic or with a stated duration of over 4 weeks) → I25.9
  • Ischemia, ischemicsupply (coronary) → I25.9
  • Atherosclerosiscoronaryartery → I25.10
  • Disease, diseasedarterycoronary → I25.10
  • Historypersonal (of)myocardial infarction (old) → I25.2
  • Infarct, infarctionmyocardium, myocardial (acute) (with stated duration of 4 weeks or less)diagnosed on ECG, but presenting no symptoms → I25.2
  • Infarct, infarctionmyocardium, myocardial (acute) (with stated duration of 4 weeks or less)healed or old → I25.2
  • Infarct, infarctionmyocardium, myocardial (acute) (with stated duration of 4 weeks or less)past (diagnosed on ECG or other investigation, but currently presenting no symptoms) → I25.2
  • Occlusion, occludedcoronary (artery) (vein) (thrombotic)healed or old → I25.2
  • Fistula (cutaneous)arteriovenous (acquired) (nonruptured)coronary → I25.41
  • Dissectionarterycoronary → I25.42
  • Ischemia, ischemicmyocardium, myocardial (chronic or with a stated duration of over 4 weeks)silent (asymptomatic) → I25.6
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)coronary (artery)bypass graft → I25.810
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)coronary (artery)transplanted heart → I25.811
  • Atherosclerosistransplanted heartnative coronary artery → I25.811
  • Atherosclerosistransplanted heartbypass graft → I25.812
  • Occlusion, occludedcoronary (artery) (vein) (thrombotic)chronic total → I25.82
  • Occlusion, occludedcoronary (artery) (vein) (thrombotic)total (chronic) → I25.82
  • Dysfunctionchroniccoronary microvascular → I25.85
  • Dysfunctioncoronary microvascularchronic → I25.85
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)coronary (arteriosclerotic) (artery)vein → I25.89

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

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

Hierarchy