Oth psychoactive substance use, unsp w intox w delirium

This code signifies a patient experiencing delirium due to the acute effects of an unspecified psychoactive substance. The substance itself is not identified, but its use has led to a disturbance in attention, awareness, and cognition. This condition is distinct from withdrawal-induced delirium.

Use this code when documentation clearly indicates delirium directly caused by the use of a psychoactive substance, but the specific substance (e.g., opioid, stimulant, hallucinogen) is not documented or is unknown. This applies to acute intoxication states where delirium is the prominent feature. Ensure the medical record differentiates this from delirium due to other medical conditions or withdrawal.

• Do not use if the specific psychoactive substance is known; instead, use the more specific F1x.921 code.
• Requires clear documentation of "delirium" and its direct link to "psychoactive substance use."
• Sequence this code as a primary diagnosis when the delirium is the primary reason for the encounter.