DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I34 Nonrheumatic mitral valve disorders

  • Header · not billable

I34 is not billable. The category heads 6 billable codes in FY2027, grouped under 5 subdivisions.

Index → code

  • Rupture, rupturedmitral (valve) → I34.89
  • Prolapse, prolapsedmitral (valve) → I34.1
  • Atheroma, atheromatousmitral (valve) → I34.89

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I30-I5A Other forms of heart disease (I30-I5A)
  3. I34 Nonrheumatic mitral valve disorders
Billable codes
6
Subdivisions
5
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
18

Codes in I34

  1. I34.0
    Nonrheumatic mitral (valve) insufficiency
    Billable
    Inclusion terms 2, Code also 2

    Inclusion terms

    • Nonrheumatic mitral (valve) incompetence NOS
    • Nonrheumatic mitral (valve) regurgitation NOS

    Code also

    • , if applicable:
    • nonrheumatic mitral (valve) annulus calcification (I34.81) I34.81
  2. I34.1
    Nonrheumatic mitral (valve) prolapse
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Floppy nonrheumatic mitral valve syndrome

    Excludes1

    • Marfan's syndrome (Q87.4-) Q87.4
  3. I34.2
    Nonrheumatic mitral (valve) stenosis
    Billable
    Code also 2

    Code also

    • , if applicable:
    • nonrheumatic mitral (valve) annulus calcification (I34.81) I34.81
  4. I34.8
    Other nonrheumatic mitral valve disorders
    Header
  5. I34.81
    Nonrheumatic mitral (valve) annulus calcification
    Billable
    Inclusion terms 2, Code also 3

    Inclusion terms

    • Nonrheumatic mitral (valve) annular calcification
    • Mitral (valve) annulus calcification NOS

    Code also

    • , if applicable:
    • nonrheumatic mitral (valve) insufficiency (I34.0) I34.0
    • nonrheumatic mitral (valve) stenosis (I34.2) I34.2
  6. I34.89
    Other nonrheumatic mitral valve disorders
    Billable
  7. I34.9
    Nonrheumatic mitral valve disorder, unspecified
    Billable

Sources of each column.

Instructions

At I34

Excludes1

  • mitral valve disease (I05.9) I05.9
  • mitral valve failure (I05.8) I05.8
  • mitral valve stenosis (I05.0) I05.0
  • mitral valve disorder of unspecified cause with diseases of aortic and/or tricuspid valve(s) (I08.-) I08
  • mitral valve disorder of unspecified cause with mitral stenosis or obstruction (I05.0) I05.0
  • mitral valve disorder specified as congenital (Q23.2, Q23.9) Q23.2 Q23.9
  • mitral valve disorder specified as rheumatic (I05.-) I05

Notes that also apply

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

Index entries

  • Insufficiency, insufficientmitral (valve) → I34.0
  • Floppynonrheumatic mitral valve syndrome → I34.1
  • Prolapse, prolapsedmitral (valve) → I34.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)mitral (heart) (valve) → I34.89
  • Atheroma, atheromatousmitral (valve) → I34.89
  • Rupture, rupturedmitral (valve) → I34.89
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)mitral → I34.89
  • Incompetency, incompetent, incompetenceannularmitral (valve) → I34.0
  • Insufficiency, insufficientmitral (valve)specified cause, except rheumatic → I34.0
  • Syndromefloppymitral valve → I34.1
  • Stenosis, stenotic (cicatricial)mitral (chronic) (inactive) (valve)specified cause, except rheumatic → I34.2
  • Calcificationmitral (valve)annular → I34.81
  • Calcificationmitral (valve)annulus → I34.81
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea)arteriosclerotic → I34.89
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea)nonrheumatic → I34.89
  • Disease, diseasedmitral (valve)nonrheumatic → I34.9
  • Calcificationmitral (valve)annularnonrheumatic → I34.81
  • Calcificationmitral (valve)annulusnonrheumatic → I34.81

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

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