DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I05 Rheumatic mitral valve diseases

  • Header · not billable

I05 is not billable. The category heads 5 billable codes in FY2027: the 5 codes directly below it.

Index → code

  • Failure, failedmitral → I05.8
  • Sclerosis, scleroticmitral → I05.8
  • Lesion(s) (nontraumatic)mitral → I05.9

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I05-I09 Chronic rheumatic heart diseases (I05-I09)
  3. I05 Rheumatic mitral valve diseases
Billable codes
5
Subdivisions
5
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
18

Codes in I05

  1. I05.0
    Rheumatic mitral stenosis
    Billable
    Inclusion terms 1

    Inclusion terms

    • Mitral (valve) obstruction (rheumatic)
  2. I05.1
    Rheumatic mitral insufficiency
    Billable
    Inclusion terms 2, Excludes1 1

    Inclusion terms

    • Rheumatic mitral incompetence
    • Rheumatic mitral regurgitation

    Excludes1

    • mitral insufficiency not specified as rheumatic (I34.0) I34.0
  3. I05.2
    Rheumatic mitral stenosis with insufficiency
    Billable
    Inclusion terms 1

    Inclusion terms

    • Rheumatic mitral stenosis with incompetence or regurgitation
  4. I05.8
    Other rheumatic mitral valve diseases
    Billable
    Inclusion terms 1

    Inclusion terms

    • Rheumatic mitral (valve) failure
  5. I05.9
    Rheumatic mitral valve disease, unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Rheumatic mitral (valve) disorder (chronic) NOS

Sources of each column.

Instructions

At I05

Includes

  • conditions classifiable to both I05.0 and I05.2-I05.9, whether specified as rheumatic or not I05.0 I05.2 I05.9

Excludes1

  • mitral valve disease specified as nonrheumatic (I34.-) I34
  • mitral valve disease with aortic and/or tricuspid valve involvement (I08.-) I08

Notes that also apply

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

Index entries

  • Stenosis, stenotic (cicatricial)mitral (chronic) (inactive) (valve) → I05.0
  • Deformitymitral (leaflets) (valve) → I05.8
  • Failure, failedmitral → I05.8
  • Sclerosis, scleroticmitral → I05.8
  • Disease, diseasedmitral (valve) → I05.9
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea) → I05.9
  • Lesion(s) (nontraumatic)mitral → I05.9
  • Insufficiency, insufficientmitral (valve)rheumatic → I05.1
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea)specified NEC → I05.8
  • Disease, diseasedheart (organic)mitral → I05.9
  • Insufficiency, insufficientmitral (valve)withobstruction or stenosis → I05.2
  • Stenosis, stenotic (cicatricial)mitral (chronic) (inactive) (valve)withincompetency, insufficiency or regurgitation → I05.2
  • Calcificationmitral (valve)annularrheumatic → I05.8
  • Calcificationmitral (valve)annulusrheumatic → I05.8
  • Disease, diseasedheart (organic)mitralspecified NEC → I05.8
  • Insufficiency, insufficientmitral (valve)rheumaticwithobstruction or stenosis → I05.2
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea)withrheumatic fever (conditions in I00)inactive or quiescent (with chorea) → I05.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)rheumatic (active) (acute) (chronic) (subacute)inactive or quiescent withendocarditismitral (valve) → I05.9

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

Hierarchy