Transient global amnesia

This code identifies a sudden, temporary episode of memory loss that cannot be attributed to a more common neurological condition like epilepsy or stroke. During an episode, individuals are typically unable to form new memories and may repeatedly ask the same questions, but retain personal identity and complex motor skills. The amnesia resolves completely, usually within 24 hours, with no lasting neurological deficits.

Apply this code when documentation clearly indicates a transient episode of anterograde and sometimes retrograde amnesia, with full recovery and no evidence of other underlying neurological pathology. This diagnosis is often made after ruling out other causes of acute memory disturbance, such as TIA, seizure, or drug-induced amnesia.

• Ensure documentation specifies the transient nature and complete resolution of the memory loss.
• Do not use this code if the amnesia is due to head trauma, substance abuse, or a cerebrovascular event.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, especially in an emergency department or observation setting.