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ICD-10 Guide
ICD-10 CodesF16.90

F16.90

Billable

Hallucinogen use, unspecified, uncomplicated

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

Code Description

ICD-10 F16.90 is a billable code used to indicate a diagnosis of hallucinogen use, unspecified, uncomplicated.

Key Diagnostic Point:

F16.90 refers to the use of hallucinogens, which are substances that alter perception, mood, and various cognitive processes. This code is used when a patient is experiencing hallucinogen use without any specified complications or associated disorders. Hallucinogens can include substances such as LSD, psilocybin (magic mushrooms), and mescaline. The uncomplicated nature of this code indicates that the patient does not exhibit withdrawal symptoms, intoxication effects, or any co-occurring mental health disorders. Clinically, patients may present with altered sensory perceptions, visual or auditory hallucinations, and changes in thought processes. Treatment typically involves supportive care, counseling, and education about substance use. It is crucial for healthcare providers to document the patient's substance use history, including frequency and quantity, to ensure accurate coding and appropriate treatment planning.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in patient presentation and symptoms
  • Need for thorough documentation of substance use history
  • Potential overlap with other substance use disorders
  • Differentiation from hallucinogen use with complications

Audit Risk Factors

  • Inadequate documentation of substance use history
  • Failure to specify the uncomplicated nature of use
  • Misclassification of hallucinogen use as a more severe disorder
  • Lack of supporting clinical evidence for the diagnosis

Specialty Focus

Medical Specialties

Addiction Medicine

Documentation Requirements

Detailed substance use history, including types of hallucinogens used, frequency, and duration.

Common Clinical Scenarios

Patients presenting for evaluation of substance use, seeking treatment for addiction, or experiencing psychological effects from hallucinogen use.

Billing Considerations

Consideration of co-occurring mental health disorders and the need for a comprehensive treatment plan.

Psychiatry

Documentation Requirements

Thorough mental health assessment, including any psychological effects of hallucinogen use.

Common Clinical Scenarios

Patients with altered mental status or those seeking help for psychological distress related to hallucinogen use.

Billing Considerations

Assessment for any underlying psychiatric conditions that may complicate treatment.

Coding Guidelines

Inclusion Criteria

Use F16.90 When
  • According to ICD
  • 10 coding guidelines, F16
  • 90 should be used when there is no evidence of withdrawal or intoxication
  • Documentation must support the diagnosis, including the patient's substance use history and current symptoms

Exclusion Criteria

Do NOT use F16.90 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

H0001CPT Code

Assessment and treatment planning

Clinical Scenario

Used when assessing a patient for hallucinogen use.

Documentation Requirements

Comprehensive assessment of substance use history and current symptoms.

Specialty Considerations

Addiction specialists should ensure thorough documentation to support the diagnosis.

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 use. F16.90 provides a clear distinction for uncomplicated cases, improving the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogen use. F16.90 provides a clear distinction for uncomplicated cases, improving the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of substance use disorders, including hallucinogen use. F16.90 provides a clear distinction for uncomplicated cases, improving the accuracy of patient records and treatment plans.

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 does F16.90 indicate?

F16.90 indicates hallucinogen use that is unspecified and uncomplicated, meaning the patient does not exhibit withdrawal or intoxication symptoms.

When should I use F16.90?

Use F16.90 when a patient presents with hallucinogen use without any complications or associated disorders.

What documentation is required for F16.90?

Documentation should include the patient's substance use history, frequency of use, and any current symptoms to support the diagnosis.