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v1.0.0
ICD-10 Guide
ICD-10 CodesG52.0

G52.0

Billable

Disorders of olfactory nerve

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

Code Description

ICD-10 G52.0 is a billable code used to indicate a diagnosis of disorders of olfactory nerve.

Key Diagnostic Point:

Disorders of the olfactory nerve (cranial nerve I) can manifest as a range of conditions affecting the sense of smell. These disorders may arise from various etiologies, including traumatic injury, neurodegenerative diseases, infections, or exposure to toxins. Patients may experience anosmia (loss of smell), hyposmia (reduced smell), or dysosmia (distorted smell perception). The olfactory nerve is responsible for transmitting sensory information from the nasal cavity to the brain, and any disruption in this pathway can lead to significant impacts on quality of life, including changes in taste and appetite. Diagnosis typically involves a thorough clinical history, olfactory testing, and imaging studies to rule out structural abnormalities. Treatment may vary based on the underlying cause and can include pharmacological interventions, olfactory training, or addressing contributing factors such as nasal obstruction. Understanding the complexities of olfactory nerve disorders is crucial for accurate diagnosis and effective management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and underlying causes
  • Need for comprehensive diagnostic testing
  • Potential overlap with other cranial nerve disorders
  • Documentation of symptom severity and duration

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to specify the type of olfactory disorder
  • Lack of supporting diagnostic tests
  • Misclassification with other cranial nerve disorders

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed history of olfactory symptoms, results from olfactory testing, and any imaging studies performed.

Common Clinical Scenarios

Patients presenting with sudden loss of smell, post-viral olfactory dysfunction, or olfactory hallucinations.

Billing Considerations

Ensure clear documentation of the onset, duration, and impact of symptoms on daily life.

Neurology

Documentation Requirements

Comprehensive neurological examination findings, including cranial nerve assessments and any relevant imaging results.

Common Clinical Scenarios

Patients with neurodegenerative diseases presenting with olfactory dysfunction as an early symptom.

Billing Considerations

Document any associated neurological symptoms to support the diagnosis.

Coding Guidelines

Inclusion Criteria

Use G52.0 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the patient's clinical presentation and any diagnostic tests performed
  • Include specific details about the type of olfactory disorder and its impact on the patient's quality of life

Exclusion Criteria

Do NOT use G52.0 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

92507CPT Code

Olfactory function testing

Clinical Scenario

Used when assessing patients with suspected olfactory nerve disorders.

Documentation Requirements

Document the type of olfactory tests performed and the results.

Specialty Considerations

Otolaryngologists should ensure comprehensive testing is documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of olfactory disorders, improving the accuracy of diagnoses and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of olfactory disorders, improving the accuracy of diagnoses and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of olfactory disorders, improving the accuracy of diagnoses and treatment plans.

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 are the common causes of disorders of the olfactory nerve?

Common causes include viral infections, head trauma, neurodegenerative diseases, and exposure to toxins. Each cause may present with different symptoms and require specific diagnostic approaches.