DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 9

I30-I5A Other forms of heart disease (I30-I5A)

Block I30-I5A groups 24 categories with 146 billable codes in FY2027. 9 codes are new this year.

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I30-I5A Other forms of heart disease (I30-I5A)

Neighbouring blocks

Categories
24
Billable codes
146
CC codes
59
MCC codes
20
HCC V28 codes
58
New FY2027
9

Categories in I30-I5A

  • I30

    Acute pericarditis

    Pneumopyopericardium → I30.1

    • 4 billable codes
    • 4 CC
  • I31

    Other diseases of pericardium

    Cardiosymphysis → I31.0

    • 8 billable codes
    • 8 CC
    • 1 with HCC
  • I32

    Pericarditis in diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 CC
  • I33

    Acute and subacute endocarditis

    Osler's nodes → I33.0

    • 2 billable codes
    • 2 MCC
  • I34

    Nonrheumatic mitral valve disorders

    Rupture, rupturedmitral (valve) → I34.89

    • 6 billable codes
  • I35

    Nonrheumatic aortic valve disorders

    Flint murmur (aortic insufficiency) → I35.1

    • 5 billable codes
  • I36

    Nonrheumatic tricuspid valve disorders

    Atheroma, atheromatoustricuspid (heart) (valve) → I36.8

    • 5 billable codes
  • I37

    Nonrheumatic pulmonary valve disorders

    Regurgitationpulmonary (valve) (heart) → I37.1

    • 5 billable codes
  • I38

    Endocarditis, valve unspecified

    Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) → I38

    • Billable, no subdivisions
    • 1 CC
  • I39

    Endocarditis and heart valve disorders in diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 CC
  • I40

    Acute myocarditis

    Abramov-Fiedler myocarditis (acute isolated myocarditis) → I40.1

    • 4 billable codes
    • 4 MCC
  • I41

    Myocarditis in diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 MCC
  • I42

    Cardiomyopathy

    Endomyofibrosis → I42.3

    • 13 billable codes
    • 13 CC
    • 7 with HCC
    • 5 new
  • I43

    Cardiomyopathy in diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 CC
    • 1 with HCC
  • I44

    Atrioventricular and left bundle-branch block

    Lenegre's disease → I44.2

    • 10 billable codes
    • 1 CC
    • 1 with HCC
  • I45

    Other conduction disorders

    Dropped heart beats → I45.9

    • 11 billable codes
    • 3 CC
  • I46

    Cardiac arrest

    Arrest, arrestedcardiac → I46.9

    • 3 billable codes
    • 3 MCC
    • 3 with HCC
  • I47

    Paroxysmal tachycardia

    Torsades de pointes → I47.21

    • 9 billable codes
    • 8 CC
    • 5 with HCC
    • 1 new
  • I48

    Atrial fibrillation and flutter

    Flutteratrial or auricular → I48.92

    • 9 billable codes
    • 7 CC
    • 9 with HCC
  • I49

    Other cardiac arrhythmias

    Nodal rhythm → I49.89

    • 12 billable codes
    • 1 CC
    • 2 MCC
    • 4 with HCC
    • 3 new
  • I50

    Heart failure

    Biventricular failure (heart) → I50.82

    • 23 billable codes
    • 7 CC
    • 6 MCC
    • 23 with HCC
  • I51

    Complications and ill-defined descriptions of heart disease

    Cardiopathy → I51.9

    • 10 billable codes
    • 2 CC
    • 2 MCC
    • 4 with HCC
  • I52

    Other heart disorders in diseases classified elsewhere

    –

    • Billable, no subdivisions
  • I5A

    Non-ischemic myocardial injury (non-traumatic)

    Neurogenic stunned myocardium → I5A

    • Billable, no subdivisions
    • 1 CC

FY2027 changes in I30-I5A

  • I42.00 Dilated cardiomyopathy, unspecified New FY2027
  • I42.01 Familial-genetic dilated cardiomyopathy New FY2027
  • I42.09 Other dilated cardiomyopathy New FY2027
  • I42.81 Arrhythmogenic cardiomyopathy New FY2027
  • I42.89 Other cardiomyopathies not elsewhere classified New FY2027
  • I47.22 Catecholaminergic polymorphic ventricular tachycardia [CPVT] New FY2027
  • I49.81 Brugada syndrome New FY2027
  • I49.82 Ventricular bigeminy New FY2027
  • I49.89 Other specified cardiac arrhythmias not elsewhere classified New FY2027
  • I42.0 Dilated cardiomyopathy Not billable since FY2027
  • I42.8 Other cardiomyopathies Not billable since FY2027
  • I49.8 Other specified cardiac arrhythmias Not billable since FY2027

Index main terms

  • Failure, failed → I35, I50 (61 entries)
  • Block, blocked → I44, I45 (51 entries)
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) → I33, I34, I35, I36, I37, I38, I42 (35 entries)
  • Pericarditis (with decompensation) (with effusion) → I30, I31 (28 entries)
  • Cardiomyopathy (familial) (idiopathic) → I42, I51 (27 entries)
  • Syndrome → I31, I34, I40, I42, I44, I45, I47, I49, I50, I51 (27 entries)
  • Tachycardia → I45, I47, I49 (25 entries)
  • Disease, diseased → I31, I34, I35, I36, I37, I38, I42, I44, I45, I47, I50, I51 (23 entries)
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile) → I40, I51 (20 entries)
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) → I34, I51 (14 entries)
  • Flutter → I48, I49 (13 entries)
  • Stenosis, stenotic (cicatricial) → I34, I35, I36, I37, I38, I42 (13 entries)
  • Premature → I49 (12 entries)
  • Insufficiency, insufficient → I34, I35, I36, I37, I38, I50 (11 entries)
  • Fibrillation → I48, I49 (10 entries)

+168 more main terms; the search box finds them by word.

Block instructions

Notes that also apply

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