2021 ICD-10-CM Code I63.212
Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
Valid for Submission
I63.212 is a billable diagnosis code used to specify a medical diagnosis of cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery. The code I63.212 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I63.212 might also be used to specify conditions or terms like cerebrovascular accident due to occlusion of left vertebral artery or cerebrovascular accident due to stenosis of left vertebral artery.
Unspecified diagnosis codes like I63.212 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.
| ICD-10: | I63.212 |
| Short Description: | Cerebral infrc due to unsp occls or stenosis of l verteb art |
| Long Description: | Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery |
Code Classification
Replaced Code
This code was replaced in the 2021 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This code was replaced for the FY 2021 (October 1, 2020 - September 30, 2021).
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Cerebrovascular accident due to occlusion of left vertebral artery
- Cerebrovascular accident due to stenosis of left vertebral artery
Convert I63.212 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code I63.212 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
- 433.21 - Ocl vrtb art w infrct (Approximate Flag)
Information for Patients
Ischemic Stroke
Also called: Embolic Stroke, Thrombotic stroke
A stroke is a medical emergency. There are two types - ischemic and hemorrhagic. Ischemic stroke is the most common type. It is usually caused by a blood clot that blocks or plugs a blood vessel in the brain. This keeps blood from flowing to the brain. Within minutes, brain cells begin to die. Another cause is stenosis, or narrowing of the artery. This can happen because of atherosclerosis, a disease in which plaque builds up inside your arteries. Transient ischemic attacks (TIAs) occur when the blood supply to the brain is interrupted briefly. Having a TIA can mean you are at risk for having a more serious stroke.
Symptoms of stroke are
- Sudden numbness or weakness of the face, arm or leg (especially on one side of the body)
- Sudden confusion, trouble speaking or understanding speech
- Sudden trouble seeing in one or both eyes
- Sudden trouble walking, dizziness, loss of balance or coordination
- Sudden severe headache with no known cause
It is important to treat strokes as quickly as possible. Blood thinners may be used to stop a stroke while it is happening by quickly dissolving the blood clot. Post-stroke rehabilitation can help people overcome disabilities caused by stroke damage.
NIH: National Institute of Neurological Disorders and Stroke
- Preventing stroke (Medical Encyclopedia)
- Stroke - discharge (Medical Encyclopedia)
- Thrombolytic therapy (Medical Encyclopedia)
[Learn More]
Code History
- 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 (First year ICD-10-CM implemented into the HIPAA code set)