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I35.9

✓ Billable

Nonrheumatic aortic valve disorder, unspecified

Diseases of the circulatory system (I00-I99)

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⚠️ Excludes2

inherited from I35

Rules from parent category I35: Nonrheumatic aortic valve disorders

  • • aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valve(s) (I08.-)
  • • aortic valve disorder specified as congenital (Q23.0, Q23.1)
  • • aortic valve disorder specified as rheumatic (I06.-)
  • • hypertrophic subaortic stenosis (I42.1)

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Code Information

CodeI35.9
BillableYes
ParentI35
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes24 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)