Transient cerebral ischemic attack, unspecified

This code represents a temporary episode of neurological dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute infarction. It signifies a transient interruption of blood flow to the brain, often presenting with stroke-like symptoms that resolve completely within 24 hours.

Use this code when documentation specifies a transient ischemic attack (TIA) without further detail regarding the specific cerebral artery involved. It is appropriate when the medical record clearly indicates a TIA diagnosis but lacks information to assign a more specific code for laterality or vessel.

• Avoid using this code if the documentation specifies a particular cerebral artery (e.g., carotid, vertebral-basilar) or laterality.
• Do not use this code if imaging confirms acute cerebral infarction, even if symptoms were transient; instead, code for the type of cerebral infarction.
• Consider sequencing this code as a primary diagnosis when the TIA is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.