2025 ICD-10-CM Diagnosis Code I34.1

by

Nonrheumatic mitral (valve) prolapse

  • I34.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM I34.1 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I34.1 – other international versions of ICD-10 I34.1 may differ.

Applicable To

  • Floppy nonrheumatic mitral valve syndrome

Type 1 Excludes

  • Marfan’s syndrome (Q87.4-)

The following code(s) above I34.1 contain annotation back-references

 that may be applicable to I34.1:

  • I00-I99  Diseases of the circulatory system
  • I34  Nonrheumatic mitral valve disorders

Approximate Synonyms

  • Mitral valve prolapse
  • Mtral valve prolapse
  • Non-rheumatic mitral valve prolapse

Clinical Information

  • A fairly common and often benign valvular heart disorder characterized by redundancy or hooding of mitral valve leaflets so that they prolapse into the left atrium, often causing mitral regurgitation. It is often a symptomless condition but may be marked by varied symptoms (e.g. Chest pain, fatigue, dizziness, dyspnea, or palpitations) leading in some cases to endocarditis or ventricular tachycardia.
  • Abnormal protrusion or billowing of one or both of the leaflets of mitral valve into the left atrium during systole. This allows the backflow of blood into left atrium leading to mitral valve insufficiency; systolic murmurs; or cardiac arrhythmia.
  • Mitral valve prolapse (mvp) occurs when one of your heart’s valves doesn’t work properly. Mvp is one of the more common heart valve conditions. Most often, it’s a lifelong condition that a person is born with. Most people with mvp have no symptoms or problems, need no treatment, and are able to lead normal, active lives. Mvp puts you at risk for infective endocarditis, a kind of heart infection. To prevent it, doctors used to prescribe antibiotics before dental work or certain surgeries. Now, only people at high risk of endocarditis need the antibiotics.if you need treatment for mvp, medicines can help relieve symptoms or prevent complications. Very few people will need surgery to repair or replace the mitral valve.
  • Prolapse of the mitral valve, often with regurgitation, associated with myxomatous proliferation of the leaflets of the mitral valve.

ICD-10-CM I34.1 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 306 Cardiac congenital and valvular disorders with mcc
  • 307 Cardiac congenital and valvular disorders without mcc

Convert I34.1 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I34.1:

  • Floppy
    • nonrheumatic mitral valve syndrome I34.1
  • Prolapse, prolapsed
    • mitral I34.1 (valve)
  • Syndrome – see also Disease
    • floppy
      • mitral valve I34.1
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