F16.221
BillableHallucinogen dependence with intoxication with delirium
HCC Category Mapping
V28HCC 137 — Drug Use Disorder/Substance Use Disorder, Moderate/Severe
0.358V24HCC 55 — Drug/Alcohol Dependence
0.334ESRDHCC 55 — Drug/Alcohol Dependence
0.000What This Code Means
A person dependent on hallucinogenic drugs is intoxicated and experiencing delirium, which includes confusion, disorientation, and altered consciousness.
Coding Tips
- •This is a more severe presentation than F16.220; delirium must be documented as present
- •Monitor vital signs and mental status closely as hallucinogen-induced delirium can be medically serious
Clinical Significance
Hallucinogen dependence with intoxication delirium represents the most severe acute presentation of hallucinogen intoxication. Delirium indicates altered consciousness, confusion, and potential danger to the patient and others, requiring immediate medical intervention and intensive monitoring.
Documentation Requirements
- ✓Documentation of hallucinogen dependence
- ✓Clinical evidence of delirium: acute onset of altered consciousness, confusion, disorientation, fluctuating awareness
- ✓Temporal relationship between hallucinogen use and onset of delirium
- ✓Mental status examination documenting specific delirium findings
- ✓Medical workup to exclude other causes of delirium (infection, metabolic, head trauma)
- ✓Type of hallucinogen when known
Commonly Confused Codes
F16.220 — Hallucinogen dependence with intoxication, uncomplicated; use when NO delirium is presentF16.229 — Hallucinogen dependence with intoxication, unspecified; avoid when delirium status can be determinedF05 — Delirium due to known physiological condition; use when delirium is NOT substance-inducedF16.251 — Hallucinogen dependence with psychotic disorder with hallucinations; psychosis differs from delirium in consciousness level
Code Hierarchy
└F16Hallucinogen related disorders└F16.2Hallucinogen dependence└F16.22Hallucinogen dependence with intoxication└F16.221Hallucinogen dependence with intoxication with delirium
└F16.221Hallucinogen dependence with intoxication with delirium