Convert ICD-9-CM Diagnosis 433.21 to ICD-10-CM

ICD-9-CM 433.21 converts approximately to:

2023 ICD-10-CM I63.019 Cerebral infarction due to thrombosis of unspecified vertebral artery
or:
2023 ICD-10-CM I63.119 Cerebral infarction due to embolism of unspecified vertebral artery
or:
2023 ICD-10-CM I63.219 Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery

Note: approximate conversions between ICD-9-CM codes and ICD-10-CM codes may require clinical interpretation in order to determine the most appropriate conversion code(s) for your specific coding situation.

Source: 2023 ICD-10-CM CMS General Equivalence Mappings.