ICD-10 Code I63 – Cerebral infarction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63 – Cerebral infarction
What it is
Cerebral infarction means brain tissue has been damaged by loss of blood supply, usually from an ischemic stroke. Use this code family when documentation identifies infarction of the brain, not just transient symptoms.
Clinical signs
Typical findings include sudden focal neurologic deficits such as weakness, speech difficulty, facial droop, or vision loss. Clinical features vary; refer to documentation and imaging or specialist assessment when available.
When to use this code
Use I63 when the provider documents cerebral infarction, ischemic stroke, or a confirmed brain infarct. Choose the most specific subcode if the record identifies the vessel, mechanism, or laterality. If the chart only says suspected stroke, check documentation before coding.
Do not use for
Do not use I63 for transient ischemic attack, hemorrhagic stroke, or nonspecific neurologic symptoms without infarction. If the record does not confirm cerebral infarction, check documentation.
Coding tip
Review imaging and final provider diagnosis together, and code the most specific I63 subcategory supported by the record.