2025 ICD-10-CM Diagnosis Code I35.9

Nonrheumatic aortic valve disorder, unspecified

  • I35.9 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 I35.9 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I35.9 – other international versions of ICD-10 I35.9 may differ.

The following code(s) above I35.9 contain annotation back-references

 that may be applicable to I35.9:

  • I00-I99  Diseases of the circulatory system
  • I35  Nonrheumatic aortic valve disorders

Approximate Synonyms

  • Aortic valve disease
  • Aortic valve disorder
  • Aortic valve disorder in childbirth
  • Aortic valve disorder postpartum
  • Maternal aortic valve disease in pregnancy
  • Maternal aortic valve disorder in pregnancy
  • Postpartum (after childbirth) aortic valve disorder

Clinical Information

  • A disorder characterized by a defect in aortic valve function or structure.
  • A heart disorder characterized by a defect in aortic valve structure or function.
  • Condition in which there is a deviation from or interruption of the normal structure or function of the valve between the left ventricle and the ascending aorta.

ICD-10-CM I35.9 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 I35.9 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 I35.9:

  • Disease, diseased – see also Syndrome
    • aortic (heart) (valve) I35.9
    • heart (organic) I51.9
      • aortic I35.9 (valve)
  • Lesion(s) (nontraumatic)
    • aortic I35.9 (valve)
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