2024 ICD-10-CM Diagnosis Code I65.9

Occlusion and stenosis of unspecified precerebral artery

ICD-10-CM:
I65.9
Short Description:
Occlusion and stenosis of unspecified precerebral artery
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the circulatory system
    (I00–I99)
    • Cerebrovascular diseases
      (I60-I69)
      • Occls and stenosis of precerb art, not rslt in cereb infrc
        (I65)

I65.9 is a billable diagnosis code used to specify a medical diagnosis of occlusion and stenosis of unspecified precerebral artery. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like I65.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Embolism of multiple and bilateral precerebral arteries
  • Embolism of precerebral artery
  • Multiple and bilateral precerebral arterial occlusion
  • Multiple AND bilateral precerebral artery obstruction
  • Multiple AND bilateral precerebral artery stenosis
  • Multiple and bilateral precerebral artery stenosis without infarction
  • Multiple AND bilateral precerebral artery thrombosis
  • Obstruction of precerebral artery
  • Postoperative thromboembolism of precerebral artery
  • Precerebral arterial occlusion
  • Stenosis of precerebral artery
  • Thromboembolus of precerebral artery
  • Thromboembolus of precerebral artery
  • Thrombosis of precerebral artery

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Occlusion and stenosis of precerebral artery NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert to ICD-9-CM Code

Source ICD-10-CM CodeTarget ICD-9-CM Code
I65.9433.90 - Ocl art NOS wo infrct
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.