Oth psychoactv sub use, unsp w persist amnestic disorder

This code signifies a diagnosis of a persisting memory impairment directly caused by the use of a psychoactive substance, where the specific substance is not identified. The amnestic disorder is chronic and continues beyond the period of acute intoxication or withdrawal. This condition impacts memory function, including the ability to learn new information or recall past events.

Apply this code when documentation clearly indicates a diagnosed, ongoing amnestic disorder attributed to the use of an unspecified psychoactive substance. This is appropriate when the clinician has confirmed the substance-induced nature of the memory deficit but the specific substance cannot be determined. Supporting documentation includes psychiatric evaluations, neurological assessments, and a history of substance use.

• Ensure the documentation explicitly states "persisting" or "chronic" amnestic disorder to differentiate from acute substance-induced delirium or transient amnesia.
• Do not use if the specific psychoactive substance is known; instead, use the more specific code for that substance with persisting amnestic disorder.
• Always sequence this code as the primary diagnosis if the amnestic disorder is the main reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.