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ICD-10-CM 2027

ICD-10 code for Apoplexy thrombosis

I63.3

Cerebral infarction due to thrombosis of cerebral arteries

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) › apoplexy”. Page updated September 29, 2026.

About coding Apoplexy thrombosis

The ICD-10-CM code for Apoplexy thrombosis is I63.3 (Cerebral infarction due to thrombosis of cerebral arteries).

Within I63 (cerebral infarction), I63.3 is specifically for cerebral infarction due to thrombosis of cerebral arteries. Related codes cover due to thrombosis of precerebral arteries (I63.0), due to embolism of precerebral arteries (I63.1), due to unspecified occlusion or stenosis of precerebral arteries (I63.2), due to embolism of cerebral arteries (I63.4), due to unspecified occlusion or stenosis of cerebral arteries (I63.5), due to cerebral venous thrombosis, nonpyogenic (I63.6), other cerebral infarction (I63.8) and unspecified (I63.9).

To report this condition, pick the subcode that matches the documentation: I63.30 (artery), I63.31 (artery), I63.32 (artery), I63.33 (artery), I63.34 (artery) and I63.39 (artery).

Use an additional code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82). Use an additional code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-).

Common questions about Apoplexy thrombosis ICD-10 codes

What is the ICD-10 code for Apoplexy thrombosis?

I63.3 — Cerebral infarction due to thrombosis of cerebral arteries (a header code; report a more specific subcode).

Is I63.3 billable?

No. I63.3 is a header code. Report one of its more specific subcodes instead.