2025 ICD-10-CM Diagnosis Code I34.9

Nonrheumatic mitral valve disorder, unspecified

• I34.9 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 I34.9 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I34.9 – other international versions of ICD-10 I34.9 may differ.

The following code(s) above I34.9 contain annotation back-references

 that may be applicable to I34.9:

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

Approximate Synonyms

• Mitral valve disease
• Non-rheumatic mitral valve disease

ICD-10-CM I34.9 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 I34.9 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 I34.9:

• Disease, diseased – see also Syndrome
  • mitral (valve) I05.9
    • nonrheumatic I34.9