DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I50 Heart failure

  • Header · not billable

I50 is not billable. The category heads 23 billable codes in FY2027, grouped under 6 subdivisions.

ICD-10 code by name

What is the ICD-10 code for heart failure, unspecified?
Heart failure ICD-10 code: I50.9 Heart failure, unspecified. Search ICD-10 for heart failure

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I30-I5A Other forms of heart disease (I30-I5A)
  3. I50 Heart failure
Billable codes
23
Subdivisions
6
CC / MCC codes
7 / 6
HCC V28 codes
23
New FY2027
0
Index entries
80

Codes in I50

  1. I50.1
    Left ventricular failure, unspecified
    BillableCC226
    Inclusion terms 6, Excludes1 2

    Inclusion terms

    • Cardiac asthma
    • Edema of lung with heart disease NOS
    • Edema of lung with heart failure
    • Left heart failure
    • Pulmonary edema with heart disease NOS
    • Pulmonary edema with heart failure

    Excludes1

    • edema of lung without heart disease or heart failure (J81.-) J81
    • pulmonary edema without heart disease or failure (J81.-) J81
  2. I50.2
    Systolic (congestive) heart failure
    Header
    Inclusion terms 2, Excludes1 1, Code also 1

    Inclusion terms

    • Heart failure with reduced ejection fraction [HFrEF]
    • Systolic left ventricular heart failure

    Excludes1

    • combined systolic (congestive) and diastolic (congestive) heart failure (I50.4-) I50.4

    Code also

    • end stage heart failure, if applicable (I50.84) I50.84
  3. I50.20
    Unspecified systolic (congestive) heart failure
    BillableCC226
  4. I50.21
    Acute systolic (congestive) heart failure
    BillableMCC225
  5. I50.22
    Chronic systolic (congestive) heart failure
    BillableCC226
  6. I50.23
    Acute on chronic systolic (congestive) heart failure
    BillableMCC224
  7. I50.3
    Diastolic (congestive) heart failure
    Header
    Inclusion terms 3, Excludes1 1, Code also 1

    Inclusion terms

    • Diastolic left ventricular heart failure
    • Heart failure with normal ejection fraction
    • Heart failure with preserved ejection fraction [HFpEF]

    Excludes1

    • combined systolic (congestive) and diastolic (congestive) heart failure (I50.4-) I50.4

    Code also

    • end stage heart failure, if applicable (I50.84) I50.84
  8. I50.30
    Unspecified diastolic (congestive) heart failure
    BillableCC226
  9. I50.31
    Acute diastolic (congestive) heart failure
    BillableMCC225
  10. I50.32
    Chronic diastolic (congestive) heart failure
    BillableCC226
  11. I50.33
    Acute on chronic diastolic (congestive) heart failure
    BillableMCC224
  12. I50.4
    Combined systolic (congestive) and diastolic (congestive) heart failure
    Header
    Inclusion terms 2, Code also 1

    Inclusion terms

    • Combined systolic and diastolic left ventricular heart failure
    • Heart failure with reduced ejection fraction and diastolic dysfunction

    Code also

    • end stage heart failure, if applicable (I50.84) I50.84
  13. I50.40
    Unspecified combined systolic (congestive) and diastolic (congestive) heart failure
    BillableCC226
  14. I50.41
    Acute combined systolic (congestive) and diastolic (congestive) heart failure
    BillableMCC225
  15. I50.42
    Chronic combined systolic (congestive) and diastolic (congestive) heart failure
    BillableCC226
  16. I50.43
    Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure
    BillableMCC224
  17. I50.8
    Other heart failure
    Header
  18. I50.81
    Right heart failure
    Header
    Inclusion terms 1

    Inclusion terms

    • Right ventricular failure
  19. I50.810
    Right heart failure, unspecified
    Billable226
    Inclusion terms 2

    Inclusion terms

    • Right heart failure without mention of left heart failure
    • Right ventricular failure NOS
  20. I50.811
    Acute right heart failure
    Billable225
    Inclusion terms 2

    Inclusion terms

    • Acute isolated right heart failure
    • Acute (isolated) right ventricular failure
  21. I50.812
    Chronic right heart failure
    Billable226
    Inclusion terms 2

    Inclusion terms

    • Chronic isolated right heart failure
    • Chronic (isolated) right ventricular failure
  22. I50.813
    Acute on chronic right heart failure
    Billable225
    Inclusion terms 4

    Inclusion terms

    • Acute on chronic isolated right heart failure
    • Acute on chronic (isolated) right ventricular failure
    • Acute decompensation of chronic (isolated) right ventricular failure
    • Acute exacerbation of chronic (isolated) right ventricular failure
  23. I50.814
    Right heart failure due to left heart failure
    Billable226
    Inclusion terms 1, Excludes1 1, Code also 1

    Inclusion terms

    • Right ventricular failure secondary to left ventricular failure

    Excludes1

    • Right heart failure with but not due to left heart failure (I50.82) I50.82

    Code also

    • the type of left ventricular failure, if known (I50.2-I50.43) I50.2 I50.43
  24. I50.82
    Biventricular heart failure
    Billable226
    Code also 1

    Code also

    • the type of left ventricular failure as systolic, diastolic, or combined, if known (I50.2-I50.43) I50.2 I50.43
  25. I50.83
    High output heart failure
    Billable226
  26. I50.84
    End stage heart failure
    Billable222
    Inclusion terms 1, Code also 1

    Inclusion terms

    • Stage D heart failure

    Code also

    • the type of heart failure as systolic, diastolic, or combined, if known (I50.2-I50.43) I50.2 I50.43
  27. I50.89
    Other heart failure
    Billable226
  28. I50.9
    Heart failure, unspecified
    Billable226
    Inclusion terms 3, Excludes2 1

    Inclusion terms

    • Cardiac, heart or myocardial failure NOS
    • Congestive heart disease
    • Congestive heart failure NOS

    Excludes2

    • fluid overload unrelated to congestive heart failure (E87.70) E87.70

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 I50

Excludes2

  • cardiac arrest (I46.-) I46
  • neonatal cardiac failure (P29.0) P29.0

Code first

  • heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8) O00 O07 O08.8
  • heart failure due to hypertension (I11.0) I11.0
  • heart failure due to hypertension with chronic kidney disease (I13.-) I13
  • heart failure following surgery (I97.13-) I97.13
  • obstetric surgery and procedures (O75.4) O75.4
  • rheumatic heart failure (I09.81) I09.81

Notes that also apply

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

Index entries

  • Biventricular failure (heart) → I50.82
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic)cardiobronchial → I50.1
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic)heart → I50.1
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic)Rostan's → I50.1
  • Stone(s)heart syndrome → I50.1
  • Syndromecardiac asthma → I50.1
  • SyndromeRidley's → I50.1
  • Syndromestone heart → I50.1
  • Ascites (abdominal)cardiac → I50.810
  • Ascites (abdominal)heart → I50.810
  • Failure, failedbiventricular → I50.82
  • Asthenia, astheniccardiac → I50.9
  • Asthenia, astheniccardiovascular → I50.9
  • Asthenia, asthenicheart → I50.9
  • Asthenia, asthenicmyocardial → I50.9
  • Failure, failedcardiorenal (chronic) → I50.9
  • Failure, failedheart (acute) (senile) (sudden) → I50.9
  • Failure, failedmyocardial, myocardium → I50.9
  • Failure, failedventricular → I50.9
  • Insufficiency, insufficientmyocardial, myocardium (with arteriosclerosis) → I50.9
  • Paralysis, paralytic (complete) (incomplete)cardiac → I50.9
  • Edema, edematous (infectious) (pitting) (toxic)lungmeaning failure, left ventricle → I50.1
  • Failure, failedventricularleft → I50.1
  • Failure, failedNote: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IVsystolic (congestive) (left ventricular) → I50.20
  • Failure, failedheart (acute) (senile) (sudden)diastolic (congestive) (left ventricular) → I50.30
  • Failure, failedheart (acute) (senile) (sudden)right (isolated) (ventricular) → I50.810
  • Failure, failedbiventriculardue to left heart failure → I50.814
  • Failure, failedheart (acute) (senile) (sudden)biventricular → I50.82
  • Failure, failedheart (acute) (senile) (sudden)combined left-right sided → I50.82
  • Failure, failedheart (acute) (senile) (sudden)high output NOS → I50.83
  • Failure, failedheart (acute) (senile) (sudden)end stage → I50.84
  • Failure, failedNote: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IVstage D → I50.84
  • Failure, failedheart (acute) (senile) (sudden)specified NEC → I50.89
  • Dysfunctionventricularwith congestive heart failure → I50.9
  • Failure, failedheart (acute) (senile) (sudden)compensated → I50.9
  • Failure, failedheart (acute) (senile) (sudden)congestive → I50.9
  • Failure, failedheart (acute) (senile) (sudden)decompensated → I50.9
  • Failure, failedheart (acute) (senile) (sudden)low output (syndrome) NOS → I50.9
  • Failure, failedNote: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IVstage B → I50.9
  • Failure, failedNote: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IVstage C → I50.9

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

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

Hierarchy