Occlusion and stenosis of unspecified cerebral artery I66.9

The ICD10 code for the diagnosis "Occlusion and stenosis of unspecified cerebral artery" is "I66.9". I66.9 is a VALID/BILLABLE ICD10 code, i.e it is valid for submission for HIPAA-covered transactions.

• I66.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2019 edition of ICD-10-CM I66.9 became effective on October 1, 2018.
• This is the American ICD-10-CM version of I66.9 - other international versions of ICD-10 I66.9 may differ.

Codes: = Billable

• I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
  • I66.9 Occlusion and stenosis of unspecified cerebral artery

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.