U.S. ICD-10-CM · FY 2027

I65 ICD-10-CM Code: Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I65

Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I65 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Cerebrovascular diseases (I60-I69)

  3. 3

    Category I65

    Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

  4. 4

    Code I65

    Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

More specific choices

Codes under I65

I65 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I65.

Code first

No “code first” instruction is listed for I65.

Use additional code

No “use additional code” instruction is listed for I65.

Excludes1

Conditions that should not be reported together with this code.

  • insufficiency, NOS, of precerebral artery (G45.-)
  • insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for I65.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I65 mean?

I65 is the FY 2027 U.S. ICD-10-CM code for “Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction.”

Is I65 a billable or specific ICD-10-CM code?

No. I65 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is I65 located in ICD-10-CM?

I65 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Cerebrovascular diseases (I60-I69) (I60–I69), under category I65, Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction.

What coding notes are listed for I65?

No inclusion terms are listed for I65 in this reference record. No code-first instruction is listed. Excludes1 notes: insufficiency, NOS, of precerebral artery (G45.-); insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2). No Excludes2 note is listed.

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