F16.921

ICD-10Billable

Hallucinogen use, unsp with intoxication with delirium

Official ICD-10-CM descriptor (FY2026)

Hallucinogen use, unspecified with intoxication with delirium

F16.921 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Other hallucinogen intoxication delirium

Related codes in F1692

Where this code sits

Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: Mental and behavioral disorders due to psychoactive substance use (F10-F19)
Parent code: F16.92

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.