2025 ICD-10-CM Diagnosis Code I35.1

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Nonrheumatic aortic (valve) insufficiency

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

Applicable To

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

The following code(s) above I35.1 contain annotation back-references

 that may be applicable to I35.1:

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

Approximate Synonyms

  • Aortic incompetence, non-rheumatic
  • Aortic valve regurgitation
  • Collapsing pulse

Clinical Information

  • Backflow of blood from the aorta into the left ventricle, due to imperfect functioning of the aortic valve
  • Backflow of blood from the aorta into the left ventricle, owing to imperfect functioning of the aortic semilunar valve.
  • Dysfunction of the aortic valve, with incomplete valve closure resulting in valvular regurgitation.
  • Pathological condition characterized by the backflow of blood from the ascending aorta back into the left ventricle, leading to regurgitation. It is caused by diseases of the aortic valve or its surrounding tissue (aortic root).
  • The backward flow of blood from the aorta into the left ventricle, owing to insufficiency of the aortic semilunar valve; it may be chronic or acute.

ICD-10-CM I35.1 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 I35.1 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

Code annotations containing back-references to I35.1:

  • Code Also: Q23.81

Diagnosis Index entries containing back-references to I35.1:

  • Austin Flint murmur I35.1 (aortic insufficiency)
  • Flint murmur I35.1 (aortic insufficiency)
  • Insufficiency, insufficient
    • aortic (valve) I35.1
      • specified cause NEC I35.1
  • Murmur (cardiac) (heart) (organic) R01.1
    • Flint I35.1
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