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v1.0.0
ICD-10 Guide
ICD-10 CodesR45.850

R45.850

Homicidal ideations

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R45.850 is a billable code used to indicate a diagnosis of homicidal ideations.

Key Diagnostic Point:

Homicidal ideations refer to thoughts or fantasies about killing another person. This symptom can arise in various psychiatric conditions, including major depressive disorder, schizophrenia, and personality disorders. Patients may express these thoughts verbally or through written communication, and they can range from fleeting thoughts to detailed plans. The presence of homicidal ideations often indicates a significant risk of violence and necessitates immediate clinical assessment and intervention. Clinicians must evaluate the context of these thoughts, including any associated factors such as substance abuse, recent trauma, or significant life stressors. The assessment should also consider the patient's history of violence, current mental state, and any protective factors that may mitigate risk. Accurate documentation of the ideations, their severity, and any associated behaviors is crucial for appropriate coding and treatment planning.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in patient presentation and context
  • Need for thorough documentation of ideations and risk factors
  • Differentiation from other psychiatric symptoms
  • Potential for co-occurring mental health conditions

Audit Risk Factors

  • Inadequate documentation of the severity and context of ideations
  • Failure to assess and document risk factors
  • Misclassification of ideations as suicidal rather than homicidal
  • Lack of follow-up documentation on patient safety and interventions

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Documentation should include a detailed history of the ideations, associated symptoms, and any interventions taken.

Common Clinical Scenarios

Patients presenting with chronic illness may express frustration leading to homicidal thoughts, necessitating a mental health evaluation.

Billing Considerations

Internal medicine providers should be aware of the interplay between physical health and mental health, ensuring comprehensive assessments.

Emergency Medicine

Documentation Requirements

Acute care documentation must capture the patient's mental status, any immediate threats, and interventions initiated.

Common Clinical Scenarios

Patients presenting to the emergency department with acute distress may express homicidal ideations, requiring rapid assessment and intervention.

Billing Considerations

Emergency providers must prioritize safety and may need to involve psychiatric services for further evaluation.

Coding Guidelines

Inclusion Criteria

Use R45.850 When
  • According to ICD
  • 10 guidelines, R45
  • 850 should be used when homicidal ideations are present without a more specific diagnosis
  • It is essential to document the context and severity of the ideations to support the code

Exclusion Criteria

Do NOT use R45.850 When
No specific exclusions found.

Related CPT Codes

90791CPT Code

Psychiatric diagnostic evaluation

Clinical Scenario

Used when evaluating a patient with homicidal ideations.

Documentation Requirements

Comprehensive history and mental status examination.

Specialty Considerations

Ensure thorough documentation of risk factors and ideations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of mental health symptoms, including homicidal ideations, improving the accuracy of mental health diagnoses and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of mental health symptoms, including homicidal ideations, improving the accuracy of mental health diagnoses and treatment planning.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of mental health symptoms, including homicidal ideations, improving the accuracy of mental health diagnoses and treatment planning.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What should I document when coding R45.850?

Document the patient's thoughts, context, severity, any associated risk factors, and interventions taken. Ensure that the documentation supports the diagnosis and reflects the clinical decision-making process.