ICD-10-CM Current in FY 2027

I63.33

Cerebral infarction due to thrombosis of posterior cerebral artery

Release: FY 2027
Effective: October 1, 2026

Official source

Hierarchy

Where I63.33 sits in the official hierarchy. Each level is the code it is classified under.

I63 Cerebral infarction
I63.3 Parent Cerebral infarction due to thrombosis of cerebral arteries
I63.33 This code Cerebral infarction due to thrombosis of posterior cerebral artery

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Includes

occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction

Inherited from I63 — Cerebral infarction

Excludes1

neonatal cerebral infarction ( P91.82- )

Inherited from I63 — Cerebral infarction

Excludes2

chronic, without residual deficits (sequelae) ( Z86.73 )

Inherited from I63 — Cerebral infarction

Excludes2

sequelae of cerebral infarction ( I69.3- )

Inherited from I63 — Cerebral infarction

Use Additional Code

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 )

Inherited from I63 — Cerebral infarction

Use Additional Code

code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score ( R29.7- )

Inherited from I63 — Cerebral infarction

More Specific Codes

4 codes under I63.33

Version History

How I63.33 appears in each release imported from the official files, newest first.

FY 2027 Effective October 1, 2026
Current

Cerebral infarction due to thrombosis of posterior cerebral artery
FY 2026 Effective October 1, 2025
Unchanged

Cerebral infarction due to thrombosis of posterior cerebral artery

Other codes under I63.3

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release: FY 2027
Effective: October 1, 2026
Source file: icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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