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ICD-10 Guide
ICD-10 CodesF16.929

F16.929

Billable

Hallucinogen use, unspecified with intoxication, unspecified

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

Code Description

ICD-10 F16.929 is a billable code used to indicate a diagnosis of hallucinogen use, unspecified with intoxication, unspecified.

Key Diagnostic Point:

F16.929 refers to the use of hallucinogens, which are substances that alter perception, mood, and various cognitive processes. This code is used when a patient presents with symptoms of intoxication from hallucinogens, but the specific substance is not identified. Hallucinogens can include substances such as LSD, psilocybin (magic mushrooms), and mescaline. Symptoms of intoxication may include visual and auditory hallucinations, altered sense of time, and significant changes in mood. The clinical presentation can vary widely, and patients may experience anxiety, paranoia, or euphoria. Treatment typically involves supportive care, as there are no specific antidotes for hallucinogen intoxication. It is crucial for healthcare providers to assess the patient's mental status, vital signs, and any potential co-occurring substance use disorders. This code is essential for capturing the complexity of hallucinogen use and its impact on mental health, particularly in emergency settings where immediate intervention may be necessary.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified nature of the hallucinogen used
  • Variability in clinical presentation and symptoms
  • Potential for co-occurring substance use disorders
  • Need for thorough documentation to support diagnosis

Audit Risk Factors

  • Inadequate documentation of substance use history
  • Failure to specify the hallucinogen when known
  • Lack of evidence for intoxication symptoms
  • Inconsistent coding with clinical notes

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed account of the patient's presentation, including vital signs, mental status, and any interventions performed.

Common Clinical Scenarios

Patients presenting with acute hallucinations, agitation, or altered mental status after suspected hallucinogen use.

Billing Considerations

Consideration of potential co-occurring medical or psychiatric conditions that may complicate treatment.

Addiction Medicine

Documentation Requirements

Comprehensive substance use history, including previous treatment attempts and current substance use patterns.

Common Clinical Scenarios

Patients seeking help for hallucinogen use or those in recovery experiencing relapse.

Billing Considerations

Assessment for underlying mental health disorders and the need for integrated treatment approaches.

Coding Guidelines

Inclusion Criteria

Use F16.929 When
  • According to ICD
  • 10 coding guidelines, F16
  • 929 should be used when there is evidence of hallucinogen use with intoxication but without specification of the substance
  • Coders should ensure that documentation supports the diagnosis and reflects the patient's clinical presentation

Exclusion Criteria

Do NOT use F16.929 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99284CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a patient presents with severe intoxication symptoms requiring immediate intervention.

Documentation Requirements

Document the patient's presenting symptoms, vital signs, and any treatments administered.

Specialty Considerations

Emergency medicine specialists should ensure thorough documentation to support the level of service provided.

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 hallucinogens. F16.929 captures the complexity of hallucinogen use and intoxication, facilitating better tracking of substance use trends and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogens. F16.929 captures the complexity of hallucinogen use and intoxication, facilitating better tracking of substance use trends and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogens. F16.929 captures the complexity of hallucinogen use and intoxication, facilitating better tracking of substance use trends and treatment outcomes.

Resources

Clinical References

  • •
    Substance Abuse and Mental Health Services Administration (SAMHSA)

Coding & Billing References

  • •
    Substance Abuse and Mental Health Services Administration (SAMHSA)

Frequently Asked Questions

What should I document to support the use of F16.929?

Document the patient's symptoms, history of hallucinogen use, any interventions provided, and the patient's response to treatment. Ensure that the clinical notes clearly reflect the diagnosis and support the coding.