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ICD-10 Guide
ICD-10 CodesR44.3

R44.3

Hallucinations, unspecified

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

Code Description

ICD-10 R44.3 is a billable code used to indicate a diagnosis of hallucinations, unspecified.

Key Diagnostic Point:

Hallucinations are perceptual experiences that occur without an external stimulus, leading individuals to perceive things that are not present in reality. The symptoms can manifest in various forms, including auditory, visual, olfactory, gustatory, or tactile hallucinations. The unspecified designation indicates that the hallucinations do not fit neatly into a specific category or diagnosis, making it essential for healthcare providers to conduct thorough evaluations to determine underlying causes. Common causes of hallucinations include psychiatric disorders such as schizophrenia, mood disorders, substance use, neurological conditions like dementia or Parkinson's disease, and severe medical illnesses. The clinical context of hallucinations is complex, as they can significantly impact a patient's quality of life and functioning. Accurate diagnosis often requires a comprehensive assessment, including a detailed patient history, mental status examination, and possibly neuroimaging or laboratory tests to rule out organic causes. Given the broad range of potential underlying conditions, the unspecified nature of this code necessitates careful documentation and consideration of the patient's overall clinical picture.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of potential underlying causes
  • Need for comprehensive patient evaluation
  • Differentiation from other psychiatric symptoms
  • Documentation of clinical context

Audit Risk Factors

  • Inadequate documentation of hallucination type
  • Failure to specify underlying conditions
  • Misuse of unspecified codes
  • Lack of supporting clinical evidence

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed patient history, including onset, duration, and context of hallucinations, as well as any relevant medical history.

Common Clinical Scenarios

Patients presenting with confusion or altered mental status, particularly in the context of systemic illness or medication effects.

Billing Considerations

Consideration of comorbidities and potential medication interactions that may contribute to hallucinations.

Emergency Medicine

Documentation Requirements

Acute assessment of mental status, including a thorough evaluation of hallucinations and any associated symptoms.

Common Clinical Scenarios

Patients presenting with acute psychosis or altered mental status, often requiring immediate intervention.

Billing Considerations

Rapid assessment and stabilization of the patient, with clear documentation of findings and interventions.

Coding Guidelines

Inclusion Criteria

Use R44.3 When
  • Coders should follow the official ICD
  • CM coding guidelines, ensuring that the code is used only when hallucinations are documented as unspecified and that all relevant clinical information is captured to support the diagnosis

Exclusion Criteria

Do NOT use R44.3 When
No specific exclusions found.

Related CPT Codes

90791CPT Code

Psychiatric diagnostic evaluation

Clinical Scenario

Used when evaluating a patient with hallucinations to establish a diagnosis.

Documentation Requirements

Comprehensive history and mental status examination.

Specialty Considerations

Documentation should reflect the complexity of the evaluation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of hallucinations, enabling better tracking of symptoms and associated conditions. R44.3 serves as a catch-all for unspecified hallucinations, emphasizing the need for thorough documentation to support the diagnosis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of hallucinations, enabling better tracking of symptoms and associated conditions. R44.3 serves as a catch-all for unspecified hallucinations, emphasizing the need for thorough documentation to support the diagnosis.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of hallucinations, enabling better tracking of symptoms and associated conditions. R44.3 serves as a catch-all for unspecified hallucinations, emphasizing the need for thorough documentation to support the diagnosis.

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

When should I use R44.3?

Use R44.3 when a patient presents with hallucinations that cannot be classified under a more specific diagnosis. Ensure that the documentation supports the use of this unspecified code.