Oth psychoactive substance use, unsp w persisting dementia

This code signifies a diagnosis of dementia that is directly caused by the chronic use of an unspecified psychoactive substance. The substance itself is not identified, but its use has led to persistent cognitive impairment. This condition is distinct from dementia due to other causes, as it is specifically induced by substance use.

Use this code when documentation clearly indicates a diagnosis of persisting dementia directly attributable to the use of a psychoactive substance, but the specific substance is not documented. This applies when the patient exhibits significant cognitive decline, memory impairment, and other dementia-like symptoms, and a causal link to substance use is established.

• Ensure documentation specifies "persisting dementia" and a clear link to psychoactive substance use.
• Avoid this code if the specific psychoactive substance is identified; instead, use the more specific code for that substance.
• This code should be sequenced as a primary diagnosis when the dementia is the focus of treatment, or as a secondary diagnosis if another condition is primary.