J84.111
BillableIdiopathic interstitial pneumonia, not otherwise specified
HCC Category Mapping
V28HCC 280 — Chronic Obstructive Pulmonary Disease
0.334V24HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders
0.268ESRDHCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders
0.000RxHCCHCC 227 — Sarcoidosis, Pulmonary Alveolar Disorders
0.000What This Code Means
Inflammation of the lung tissue with unknown cause that doesn't fit into other specific interstitial pneumonia categories.
Coding Tips
- •This is a diagnosis of exclusion; ensure other specific interstitial pneumonias have been ruled out
- •Document clinical, radiological, and pathological findings supporting this diagnosis
Clinical Significance
Idiopathic interstitial pneumonia not otherwise specified represents a significant diagnostic category in risk adjustment because it indicates chronic, progressive lung disease requiring ongoing specialist management. This diagnosis reflects substantial resource utilization including pulmonary function monitoring, imaging surveillance, and potential immunosuppressive therapy. Accurate capture ensures appropriate risk-adjusted payment for the complexity of care these patients require.
Documentation Requirements
- ✓Pulmonologist or treating physician documentation confirming the idiopathic interstitial pneumonia diagnosis
- ✓High-resolution computed tomography findings or lung biopsy results supporting the diagnosis
- ✓Documentation that other causes of interstitial pneumonia have been excluded (infections, drugs, connective tissue disease, environmental exposures)
- ✓Current disease status, severity, and functional impact (e.g., oxygen requirements, pulmonary function test results)
- ✓Treatment plan including medications and follow-up schedule
Commonly Confused Codes
J84.112 — Idiopathic pulmonary fibrosis is a specific subtype with UIP pattern; J84.111 is used when the specific IIP subtype cannot be determinedJ84.113 — Idiopathic non-specific interstitial pneumonitis has a distinct NSIP pattern on imaging/biopsy unlike NOSJ84.9 — Interstitial pulmonary disease unspecified is less specific and should not be used when idiopathic interstitial pneumonia is documentedJ84.89 — Other specified interstitial pulmonary diseases covers known-cause interstitial diseases, not idiopathic ones
Code Hierarchy
└J84Other interstitial pulmonary diseases└J84.1Other interstitial pulmonary diseases with fibrosis└J84.11Idiopathic interstitial pneumonia└J84.111Idiopathic interstitial pneumonia, not otherwise specified
└J84.111Idiopathic interstitial pneumonia, not otherwise specified