F16.121 is the authoritative medical code for Hallucinogen abuse with intoxication with delirium. This classification is used in medical billing and clinical recording to specify the clinical criteria for hallucinogen abuse with intoxication with delirium (ICD-10-CM F16.121), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Hallucinogen abuse with intoxication with delirium is a billable ICD-10-CM diagnosis code F16.121. Includes: ecstasy; PCP; phencyclidine. Excludes1 (not coded here): hallucinogen dependence F16.2-; hallucinogen use, unspecified F16.9-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for F16.121 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- hallucinogen dependence F16.2-
- hallucinogen use, unspecified F16.9-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with F16.121?
Per official ICD-10-CM Excludes1 instructions, F16.121 must not be reported together with: hallucinogen dependence (F16.2-); hallucinogen use, unspecified (F16.9-).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to F16.121 in its code family, with their registry titles.
- F16 — Hallucinogen related disorders
- F16.1 — Hallucinogen abuse
- F16.10 — Hallucinogen abuse, uncomplicated
- F16.11 — Hallucinogen abuse, in remission
- F16.12 — Hallucinogen abuse with intoxication
- F16.120 — Hallucinogen abuse with intoxication, uncomplicated
- F16.122 — Hallucinogen abuse with intoxication with perceptual disturbance
- F16.129 — Hallucinogen abuse with intoxication, unspecified
- F16.14 — Hallucinogen abuse with hallucinogen-induced mood disorder
- F16.15 — Hallucinogen abuse with hallucinogen-induced psychotic disorder
View all 40 codes in the F16 family
Indexed Clinical Terms (5)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Abuse, drug NEC (non-dependent), hallucinogen, with, intoxication, with, delirium
- Delirium, delirious (acute or subacute) (not alcohol- or drug-induced), due to (secondary to), hallucinogen intoxication, in, abuse
- Delirium, delirious (acute or subacute) (not alcohol- or drug-induced), due to (secondary to), phencyclidine intoxication (acute), in, abuse
- Disorder (of), hallucinogen use, mild, with, hallucinogen intoxication delirium
- Disorder (of), phencyclidine use, mild, with, phencyclidine intoxication delirium