DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I24 Other acute ischemic heart diseases

  • Header · not billable

I24 is not billable. The category heads 5 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

  • Dressler's syndrome → I24.1
  • Cyanotic heart disease → I24.9
  • Syndromepostinfarction → I24.1

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I20-I25 Ischemic heart diseases (I20-I25)
  3. I24 Other acute ischemic heart diseases
Billable codes
5
Subdivisions
4
CC / MCC codes
5 / 0
HCC V28 codes
5
New FY2027
0
Index entries
23

Codes in I24

  1. I24.0
    Acute coronary thrombosis not resulting in myocardial infarction
    BillableCC229
    Inclusion terms 3, Excludes1 1

    Inclusion terms

    • Acute coronary (artery) (vein) embolism not resulting in myocardial infarction
    • Acute coronary (artery) (vein) occlusion not resulting in myocardial infarction
    • Acute coronary (artery) (vein) thromboembolism not resulting in myocardial infarction

    Excludes1

    • atherosclerotic heart disease (I25.1-) I25.1
  2. I24.1
    Dressler's syndrome
    BillableCC229
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Postmyocardial infarction syndrome

    Excludes1

    • postinfarction angina (I23.7) I23.7
  3. I24.8
    Other forms of acute ischemic heart disease
    Header
    Excludes1 1

    Excludes1

    • myocardial infarction due to demand ischemia (I21.A1) I21.A1
  4. I24.81
    Acute coronary microvascular dysfunction
    BillableCC229
    Inclusion terms 1

    Inclusion terms

    • Acute (presentation of) coronary microvascular disease
  5. I24.89
    Other forms of acute ischemic heart disease
    BillableCC229
  6. I24.9
    Acute ischemic heart disease, unspecified
    BillableCC229
    Excludes1 1

    Excludes1

    • ischemic heart disease (chronic) NOS (I25.9) I25.9

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 I24

Excludes1

  • angina pectoris (I20.-) I20
  • transient myocardial ischemia in newborn (P29.4) P29.4

Excludes2

  • non-ischemic myocardial injury (I5A) I5A

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

  • Dressler's syndrome → I24.1
  • Cyanotic heart disease → I24.9
  • Pericarditis (with decompensation) (with effusion)postinfarction → I24.1
  • SyndromeDressler's (postmyocardial infarction) → I24.1
  • Syndromepostinfarction → I24.1
  • Syndromepostmyocardial infarction → I24.1
  • Insufficiency, insufficientcoronary (acute or subacute) → I24.89
  • Ischemia, ischemicdemand (coronary) → I24.89
  • Occlusion, occludedarterycoronary (acute) (thrombotic) (without myocardial infarction) → I24.0
  • Occlusion, occludedcoronary (artery) (vein) (thrombotic)not resulting in infarction → I24.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)coronary (artery) (vein)not resulting in infarction → I24.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)parietalnot resulting in infarction → I24.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)ventriclenot resulting in infarction → I24.0
  • Syndromepostcardiac injurypostmyocardial infarction → I24.1
  • Dysfunctioncoronary microvascularacute → I24.81
  • Insufficiency, insufficientarterialcoronary (acute or subacute) → I24.89
  • Ischemia, ischemicheart (chronic or with a stated duration of over 4 weeks)acute or with a stated duration of 4 weeks or less → I24.9
  • Ischemia, ischemicheart (chronic or with a stated duration of over 4 weeks)subacute → I24.9
  • Syndromecoronaryacute NEC → I24.9
  • Embolism (multiple) (paradoxical)arterycoronarynot resulting in infarction → I24.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)artery, arteries (postinfectional)coronarynot resulting in infarction → I24.0
  • Disease, diseasedcoronary (artery)microvascularacute → I24.81
  • Disease, diseasedheart (organic)ischemic (chronic or with a stated duration of over 4 weeks)specified form NECacute → I24.89

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

Hierarchy