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ICD-10 Guide
ICD-10 CodesF15.921

F15.921

Billable

Other stimulant use, unspecified with intoxication delirium

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

Code Description

ICD-10 F15.921 is a billable code used to indicate a diagnosis of other stimulant use, unspecified with intoxication delirium.

Key Diagnostic Point:

F15.921 refers to a condition characterized by the use of unspecified stimulants leading to intoxication delirium. Stimulants are substances that increase activity in the brain, resulting in heightened alertness, attention, and energy. When used excessively or inappropriately, these substances can lead to severe psychological and physiological effects, including delirium, which is a state of severe confusion and disorientation. Symptoms of intoxication delirium may include agitation, hallucinations, paranoia, and altered mental status. The diagnosis of F15.921 is crucial for identifying individuals who may be struggling with stimulant use disorders, which can lead to significant health complications and require targeted treatment interventions. Treatment often involves a combination of medical management, behavioral therapies, and support programs to address both the substance use and any co-occurring mental health issues. Accurate coding of this condition is essential for appropriate treatment planning and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in stimulant substances leading to different clinical presentations.
  • Need for comprehensive documentation of intoxication symptoms.
  • Potential overlap with other substance use disorders.
  • Differentiation from other mental health conditions such as psychosis.

Audit Risk Factors

  • Inadequate documentation of the specific stimulant used.
  • Failure to document the severity and duration of delirium symptoms.
  • Lack of evidence for the treatment plan related to the diagnosis.
  • Misclassification of the condition as a different substance use disorder.

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed mental status examination and history of substance use.

Common Clinical Scenarios

Patients presenting with acute agitation and confusion after stimulant use.

Billing Considerations

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

Addiction Medicine

Documentation Requirements

Comprehensive assessment of substance use history and treatment response.

Common Clinical Scenarios

Patients in withdrawal or experiencing complications from stimulant use.

Billing Considerations

Integration of behavioral health interventions and monitoring for relapse.

Coding Guidelines

Inclusion Criteria

Use F15.921 When
  • According to ICD
  • 10 coding guidelines, F15
  • 921 should be used when the specific stimulant is not identified, but the patient presents with intoxication delirium
  • Coders must ensure that the documentation supports the diagnosis and reflects the severity of symptoms

Exclusion Criteria

Do NOT use F15.921 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 F15.921.

Documentation Requirements

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

Specialty Considerations

Psychiatrists may need to include mental status evaluations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of stimulant use disorders, improving the ability to track and treat these conditions effectively. F15.921 provides a clear framework for identifying patients with acute intoxication delirium, which is critical for appropriate intervention.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of stimulant use disorders, improving the ability to track and treat these conditions effectively. F15.921 provides a clear framework for identifying patients with acute intoxication delirium, which is critical for appropriate intervention.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of stimulant use disorders, improving the ability to track and treat these conditions effectively. F15.921 provides a clear framework for identifying patients with acute intoxication delirium, which is critical for appropriate intervention.

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 are the common stimulants associated with F15.921?

Common stimulants include amphetamines, methamphetamines, and certain prescription medications used for ADHD. However, F15.921 is used when the specific stimulant is not identified.