Convert ICD-10-CM I66.9 to ICD-9-CM

ICD-10-CM I66.9 converts approximately to:
  • 2015 ICD-9-CM 434.10 Cerebral embolism without mention of cerebral infarction
  • 2015 ICD-9-CM 434.90 Cerebral artery occlusion, unspecified without mention of cerebral infarction

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: 2020 ICD-10-CM CMS General Equivalence Mappings.