Billable / Specific Code
ICD-10-CM S06.821 is the diagnosis code for Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 30 minutes or less. This code falls under the section "Injuries to the head" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where S06.821 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, S06.821 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
S06.821 is the ICD-10-CM diagnosis code for "Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 30 minutes or less". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S06.821 is S06.82 ("Injury of left internal carotid artery, intracranial portion, not elsewhere classified"). S06.821 provides a more specific classification within this category.
S06.821 is located in Section S00-S09 — "Injuries to the head" within Chapter 19 of the ICD-10-CM Tabular List.
Use S06.821 when the patients documented diagnosis matches "Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 30 minutes or less" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 30 minutes or less is S06.821.
Yes, S06.821 can be used as a primary diagnosis code since it is billable and specific.
S06.821 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S06.821 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.