2025 ICD-10-CM Diagnosis Code I34.0

Nonrheumatic mitral (valve) insufficiency

• I34.0 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 I34.0 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I34.0 – other international versions of ICD-10 I34.0 may differ.

Applicable To

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

Code Also

• , if applicable:
• nonrheumatic mitral (valve) annulus calcification (I34.81)

The following code(s) above I34.0 contain annotation back-references

 that may be applicable to I34.0:

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

Approximate Synonyms

• Mitral valve regurgitation
• Non-rheumatic mitral regurgitation

Clinical Information

• Backflow of blood from the left ventricle into the left atrium due to imperfect closure of the mitral valve. This can lead to mitral valve regurgitation.
• Backflow of blood from the left ventricle into the left atrium, owing to imperfect functioning of the mitral valve.
• Blood flows backward because the mitral valve closes improperly
• Dysfunction of the mitral valve, with incomplete valve closure resulting in valvular regurgitation.
• The backward flow of blood from the left ventricle into the left atrium, owing to insufficiency of the mitral valve; it may be acute or chronic, usually due to mitral valve prolapse, rheumatic heart disease or a complication of cardiac dilatation.

ICD-10-CM I34.0 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 I34.0 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

Code annotations containing back-references to I34.0:

• Code Also: I34.81
• Type 1 Excludes: I05.1

Diagnosis Index entries containing back-references to I34.0:

• Incompetency, incompetent, incompetence
  • annular
    • mitral I34.0 (valve)
• Insufficiency, insufficient
  • mitral (valve) I34.0
    • specified cause, except rheumatic I34.0