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ICD-10 Guide
ICD-10 CodesF16.159

F16.159

Billable

Hallucinogen abuse with hallucinogen-induced psychotic disorder, unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 F16.159 is a billable code used to indicate a diagnosis of hallucinogen abuse with hallucinogen-induced psychotic disorder, unspecified.

Key Diagnostic Point:

F16.159 refers to a condition characterized by the abuse of hallucinogenic substances, leading to a psychotic disorder that is not specified further. Hallucinogens, such as LSD, psilocybin, and mescaline, can induce profound alterations in perception, mood, and cognitive processes. When abused, these substances can lead to significant psychological distress and impairment. The psychotic disorder may manifest as hallucinations, delusions, and disorganized thinking, which can severely impact an individual's ability to function in daily life. The unspecified nature of this code indicates that the specific type of psychotic disorder is not detailed, which can complicate treatment and management. Treatment typically involves a combination of psychiatric intervention, counseling, and support for substance use disorders, focusing on both the psychological effects of the hallucinogen and the underlying addiction. Understanding the nuances of this code is essential for accurate diagnosis and appropriate treatment planning.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation of psychotic symptoms
  • Need for comprehensive documentation of substance use history
  • Differentiation from other substance-induced disorders
  • Potential overlap with other mental health diagnoses

Audit Risk Factors

  • Inadequate documentation of substance use history
  • Failure to specify the nature of psychotic symptoms
  • Misalignment between diagnosis and treatment provided
  • Inconsistent coding across multiple encounters

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed patient history, including substance use and mental health history, specific symptoms, and treatment plans.

Common Clinical Scenarios

Patients presenting with acute psychosis following hallucinogen use, chronic users experiencing persistent psychotic symptoms.

Billing Considerations

Consideration of co-occurring mental health disorders and the need for a multidisciplinary approach to treatment.

Addiction Medicine

Documentation Requirements

Comprehensive assessment of substance use patterns, psychosocial factors, and treatment history.

Common Clinical Scenarios

Patients in withdrawal from hallucinogens, those seeking rehabilitation for hallucinogen abuse.

Billing Considerations

Integration of behavioral therapies and support systems in treatment plans.

Coding Guidelines

Inclusion Criteria

Use F16.159 When
  • According to ICD
  • 10 guidelines, F16
  • 159 should be used when a patient exhibits symptoms of psychosis due to hallucinogen abuse without further specification
  • Coders must ensure that the diagnosis aligns with clinical documentation and that all relevant symptoms are captured

Exclusion Criteria

Do NOT use F16.159 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

Used for follow-up visits for patients diagnosed with F16.159.

Documentation Requirements

Document the patient's history, mental status examination, and treatment plan.

Specialty Considerations

Psychiatrists may need to provide detailed notes on the patient's substance use history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogen abuse. This specificity aids in better tracking of treatment outcomes and resource allocation for mental health services.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogen abuse. This specificity aids in better tracking of treatment outcomes and resource allocation for mental health services.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogen abuse. This specificity aids in better tracking of treatment outcomes and resource allocation for mental health services.

Resources

Clinical References

  • •
    Substance Abuse and Mental Health Services Administration (SAMHSA)
  • •
    National Institute on Drug Abuse (NIDA)

Coding & Billing References

  • •
    Substance Abuse and Mental Health Services Administration (SAMHSA)
  • •
    National Institute on Drug Abuse (NIDA)

Frequently Asked Questions

What are the common hallucinogens associated with F16.159?

Common hallucinogens include LSD, psilocybin (magic mushrooms), mescaline, and DMT. Each can lead to significant alterations in perception and mood, contributing to the psychotic symptoms described in F16.159.

How can clinicians differentiate F16.159 from other psychotic disorders?

Clinicians should assess the timing of symptom onset in relation to hallucinogen use, evaluate the patient's substance use history, and rule out other primary psychotic disorders through comprehensive assessment.