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ICD-10 Guide
ICD-10 CodesF11.121

F11.121

Billable

Opioid abuse with intoxication delirium

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

Code Description

ICD-10 F11.121 is a billable code used to indicate a diagnosis of opioid abuse with intoxication delirium.

Key Diagnostic Point:

F11.121 refers to a clinical condition characterized by the abuse of opioids, leading to a state of intoxication accompanied by delirium. Opioid abuse is a significant public health concern, often resulting in physical dependence and addiction. Intoxication delirium manifests as confusion, altered consciousness, and cognitive impairment, which can complicate the clinical picture. Patients may present with symptoms such as drowsiness, slurred speech, and impaired coordination. The condition is often exacerbated by the use of multiple substances, which can lead to poly-drug intoxication. Effective management requires a comprehensive approach, including medical detoxification, behavioral therapies, and support systems to address the underlying substance use disorder. Clinicians must carefully assess the severity of the intoxication and delirium to provide appropriate interventions, which may include the use of opioid antagonists like naloxone in emergency situations. Long-term treatment strategies often involve medication-assisted treatment (MAT) and counseling to promote recovery and prevent relapse.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between intoxication and withdrawal symptoms
  • Identifying co-occurring mental health disorders
  • Documenting the severity of delirium accurately
  • Understanding the nuances of substance abuse terminology

Audit Risk Factors

  • Inadequate documentation of the patient's mental status
  • Failure to specify the type of opioid abused
  • Lack of evidence for the diagnosis of delirium
  • Inconsistent coding of co-occurring conditions

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed mental status examination and history of substance use.

Common Clinical Scenarios

Patients presenting with acute confusion and a history of opioid use.

Billing Considerations

Consideration of underlying psychiatric disorders that may complicate the diagnosis.

Addiction Medicine

Documentation Requirements

Comprehensive assessment of substance use history and treatment plans.

Common Clinical Scenarios

Patients in withdrawal or seeking treatment for opioid dependence.

Billing Considerations

Integration of behavioral health interventions with pharmacotherapy.

Coding Guidelines

Inclusion Criteria

Use F11.121 When
  • According to ICD
  • 10 guidelines, F11
  • 121 should be used when there is clear documentation of opioid abuse leading to intoxication delirium
  • It is essential to document the specific opioids involved and the clinical manifestations of delirium

Exclusion Criteria

Do NOT use F11.121 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

H0031CPT Code

Mental health assessment

Clinical Scenario

Used when assessing a patient with opioid abuse and delirium.

Documentation Requirements

Comprehensive mental health evaluation notes.

Specialty Considerations

Psychiatric evaluation must include 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 opioid-related disorders, improving the accuracy of data collection and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of opioid-related disorders, improving the accuracy of data collection and treatment planning.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of opioid-related disorders, improving the accuracy of data collection and treatment planning.

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 F11.121 and F11.120?

F11.121 includes the presence of intoxication delirium, while F11.120 refers to opioid abuse without any intoxication symptoms.