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ICD-10 Guide
ICD-10 CodesJ84.111

J84.111

Idiopathic interstitial pneumonia, not otherwise specified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 J84.111 is a billable code used to indicate a diagnosis of idiopathic interstitial pneumonia, not otherwise specified.

Key Diagnostic Point:

Idiopathic interstitial pneumonia (IIP) is a group of lung diseases characterized by inflammation and scarring (fibrosis) of the lung tissue. The term 'idiopathic' indicates that the cause of the condition is unknown. Clinically, patients may present with progressive dyspnea (shortness of breath), a persistent dry cough, and fatigue. Physical examination may reveal crackles on auscultation and signs of respiratory distress. The disease primarily affects the interstitial lung tissue, which is the area surrounding the air sacs (alveoli) in the lungs. Over time, the inflammation can lead to irreversible lung damage and respiratory failure. Diagnostic considerations include high-resolution computed tomography (HRCT) scans, which can reveal characteristic patterns of lung involvement, and lung biopsy, which may be necessary to confirm the diagnosis. Pulmonary function tests often show restrictive lung disease patterns. Early diagnosis and management are crucial to slowing disease progression and improving quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires differential diagnosis from other interstitial lung diseases.
  • Treatment complexity: Management may involve corticosteroids, immunosuppressants, or lung transplantation.
  • Documentation requirements: Detailed clinical notes and imaging results are essential.
  • Coding specificity: Requires accurate identification of idiopathic versus secondary causes.

Audit Risk Factors

  • Common coding errors: Misclassification of IIP as other lung diseases.
  • Documentation gaps: Incomplete clinical history or imaging reports.
  • Billing challenges: Potential denials due to lack of supporting documentation.

Specialty Focus

Medical Specialties

Pulmonology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Rheumatology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Idiopathic interstitial pneumonia has significant clinical implications, affecting a substantial number of individuals, particularly older adults. The disease can lead to considerable morbidity and mortality, impacting healthcare utilization patterns due to frequent hospitalizations and the need for specialized care. Understanding the epidemiology of IIP is essential for developing quality measures and improving patient outcomes in this population.

ICD-9 vs ICD-10

Idiopathic interstitial pneumonia has significant clinical implications, affecting a substantial number of individuals, particularly older adults. The disease can lead to considerable morbidity and mortality, impacting healthcare utilization patterns due to frequent hospitalizations and the need for specialized care. Understanding the epidemiology of IIP is essential for developing quality measures and improving patient outcomes in this population.

Reimbursement & Billing Impact

Reimbursement considerations include the complexity of care provided, especially if the patient requires advanced therapies such as immunosuppressants or lung transplantation. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity for diagnostic tests and treatments.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for J00-J99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for J00-J99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by J84.111?

J84.111 specifically covers idiopathic interstitial pneumonia, which includes various forms of IIP such as idiopathic pulmonary fibrosis (IPF) when no other underlying cause is identified. It is essential to differentiate it from secondary interstitial lung diseases caused by known factors like autoimmune diseases or environmental exposures.

When should J84.111 be used instead of related codes?

J84.111 should be used when a patient presents with idiopathic interstitial pneumonia that cannot be attributed to any known cause. If there is evidence of a specific underlying condition, other codes should be considered, such as J84.10 for unspecified interstitial lung disease.

What documentation supports J84.111?

Documentation supporting J84.111 should include a thorough clinical evaluation, imaging studies (preferably HRCT), pulmonary function tests, and any relevant laboratory results. A detailed history that rules out other potential causes of interstitial lung disease is also critical.