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ICD-10 Guide
ICD-10 CodesF12.921

F12.921

Billable

Cannabis use, unspecified with intoxication delirium

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

Code Description

ICD-10 F12.921 is a billable code used to indicate a diagnosis of cannabis use, unspecified with intoxication delirium.

Key Diagnostic Point:

Cannabis use disorder is characterized by a problematic pattern of cannabis use leading to clinically significant impairment or distress. The diagnosis of intoxication delirium indicates that the individual is experiencing acute cognitive impairment, altered consciousness, and perceptual disturbances due to recent cannabis use. Symptoms may include confusion, disorientation, anxiety, and hallucinations. The severity of intoxication can vary based on the amount and potency of cannabis consumed, as well as individual tolerance levels. Treatment typically involves supportive care, including monitoring vital signs, ensuring patient safety, and providing a calm environment. In some cases, benzodiazepines may be used to manage severe agitation or anxiety. Long-term management may include counseling and participation in substance use treatment programs to address underlying addiction issues. It is essential for healthcare providers to document the specifics of the cannabis use, including frequency, quantity, and any co-occurring mental health conditions, 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 detailed documentation of cannabis use history
  • Differentiation from other substance use disorders
  • Potential for co-occurring mental health disorders

Audit Risk Factors

  • Inadequate documentation of cannabis use history
  • Failure to document the presence of delirium symptoms
  • Misclassification of intoxication severity
  • Lack of evidence for supportive care provided

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed assessment of mental status, history of substance use, and any co-occurring psychiatric disorders.

Common Clinical Scenarios

Patients presenting with acute psychosis or severe anxiety following cannabis use.

Billing Considerations

Consideration of the patient's mental health history and potential for dual diagnosis.

Emergency Medicine

Documentation Requirements

Comprehensive evaluation of vital signs, mental status examination, and substance use history.

Common Clinical Scenarios

Patients presenting to the emergency department with acute agitation or altered mental status after cannabis use.

Billing Considerations

Rapid assessment and stabilization of the patient are critical, along with clear documentation of interventions.

Coding Guidelines

Inclusion Criteria

Use F12.921 When
  • According to ICD
  • 10 guidelines, F12
  • 921 should be used when there is evidence of cannabis use leading to intoxication delirium
  • Documentation must support the diagnosis, including symptoms and treatment provided

Exclusion Criteria

Do NOT use F12.921 When
  • Exclusion criteria include cases where cannabis use is not the primary cause of delirium

Related ICD-10 Codes

Related CPT Codes

99284CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a patient presents with acute intoxication delirium requiring immediate intervention.

Documentation Requirements

Document the patient's presenting symptoms, assessment findings, and treatment provided.

Specialty Considerations

Emergency medicine providers should ensure thorough documentation of the patient's mental status and any interventions performed.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of cannabis-related disorders, improving the ability to track and manage substance use disorders more effectively. F12.921 provides a clear distinction for cases involving intoxication delirium, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of cannabis-related disorders, improving the ability to track and manage substance use disorders more effectively. F12.921 provides a clear distinction for cases involving intoxication delirium, which was less defined in ICD-9.

Reimbursement & Billing Impact

reimbursement.

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 is the difference between F12.921 and F12.90?

F12.921 indicates cannabis use with intoxication delirium, requiring documentation of acute cognitive impairment and altered consciousness, while F12.90 is used for unspecified cannabis use without such symptoms.