ICD-10-CM
ICD-10 code for Lesion (s) (nontraumatic) aortic (valve): I35.9
The ICD-10-CM index points "Lesion (s) (nontraumatic) aortic (valve)" to I35.9, Nonrheumatic aortic valve disorder, unspecified. I35.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in I35
A header groups codes and is not billed. A billable code is one you can report.
- I35Nonrheumatic aortic valve disordersHeader
- I35.0Nonrheumatic aortic (valve) stenosisBillable
- I35.1Nonrheumatic aortic (valve) insufficiencyBillable
- I35.2Nonrheumatic aortic (valve) stenosis with insufficiencyBillable
- I35.8Other nonrheumatic aortic valve disordersBillable
- I35.9Nonrheumatic aortic valve disorder, unspecifiedBillable
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From I35. A note on a category applies to every code under it.
Code also, if applicable, bicuspid aortic valve (Q23.81)
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From I35. A note on a category applies to every code under it.
Related conditions
Related pages
- I35.9 code detailsNotes, nearby codes, CMS-HCC group
- Category I35Every code under it
- Chapter 9Diseases of the circulatory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Lesion (s) (nontraumatic) aortic (valve)?
The ICD-10-CM index points "Lesion (s) (nontraumatic) aortic (valve)" to I35.9, Nonrheumatic aortic valve disorder, unspecified. I35.9 is a billable code.
Is I35.9 billable?
Yes. I35.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to I35.9?
The CDC tabular list gives 4 Excludes2 notes (may be coded together when both are documented) for I35.9 and the categories above it. They are listed on this page.
What chapter is I35.9 in?
Chapter 9. Diseases of the circulatory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.