F16.20 Hallucinogen dependence, uncomplicated

The ICD-10-CM code for Hallucinogen dependence, uncomplicated is F16.20 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

Section

F10-F19: Mental and behavioral disorders due to psychoactive substance use (F10-F19)

Category F16

53 codes (40 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F16.20:

• LSD reaction (acute) (without dependence) › with dependence
• Disorder (of) › hallucinogen use › moderate or severe
• Dependence (on) (syndrome) › drug NEC › hallucinogen
• Disorder (of) › phencyclidine use › moderate or severe

Inclusion Terms

• Other hallucinogen use disorder, moderate
• Other hallucinogen use disorder, severe
• Phencyclidine use disorder, moderate
• Phencyclidine use disorder, severe

U.S. Hospital Utilization

• An estimated 2,140 U.S. inpatient stays in 2023 included F16.20 among the documented diagnoses.
• 145 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Pain disorders related to psychological factors (TOC entry)

a. Pain disorders related to psychological factors ..................................................................... 43

Psychoactive substance use disorders (TOC entry)

b. Mental and behavioral disorders due to psychoactive substance use ................................... 43

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)