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ICD-9-CM diagnosis code (retired)

433.21 — Occlusion and stenosis of vertebral artery with cerebral infarction

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 433.21

433.21 is an ICD-9-CM diagnosis code for occlusion and stenosis of vertebral artery with cerebral infarction. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 3 ICD-10-CM codes, such as I63.019 (Cerebral infarction due to thrombosis of unspecified vertebral artery), I63.119 (Cerebral infarction due to embolism of unspecified vertebral artery) and I63.219 (Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 433.21

What is the ICD-10 code for ICD-9 433.21?

The GEMs map 433.21 to ICD-10-CM I63.019, I63.119 and I63.219.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.