ICD-10 Code F16.929 – Hallucinogen use, unspecified with intoxication, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.929 – Hallucinogen use, unspecified with intoxication, unspecified
What it is
This code identifies hallucinogen use with intoxication when the specific substance is not documented. It reflects an acute intoxication state, not dependence or withdrawal.
Clinical signs
Clinical features vary; refer to documentation. Typical intoxication findings may include altered perception, impaired judgment, disorganized behavior, anxiety, or agitation after hallucinogen use.
When to use this code
Use this code when the record states hallucinogen intoxication but does not name the drug. It is appropriate for emergency, inpatient, or outpatient documentation that confirms acute intoxication from a hallucinogen. If the substance is identified, code the specific hallucinogen instead.
Do not use for
Do not use this code for hallucinogen dependence, abuse, or withdrawal without intoxication. Do not use it when the documentation specifies a different substance or another cause of altered mental status.
Coding tip
Check the chart for the exact substance and level of intoxication before assigning an unspecified code.