J84.10
BillablePulmonary fibrosis, unspecified
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
Scarring and stiffening of lung tissue that impairs breathing, when the specific cause is not identified.
Coding Tips
- •This is an unspecified code; attempt to determine the underlying cause and use a more specific code if possible
- •Review imaging and biopsy results to identify the type of pulmonary fibrosis
Clinical Significance
Unspecified pulmonary fibrosis represents a significant documentation gap because modern pulmonary medicine classifies pulmonary fibrosis into distinct subtypes with different treatments and prognoses. While it carries the same HCC weight as specified forms, this code should trigger a provider query to determine the specific type (idiopathic, drug-induced, radiation-related, etc.) for both clinical management and accurate risk adjustment.
Documentation Requirements
- ✓Documentation of pulmonary fibrosis on imaging (reticular pattern, honeycombing, traction bronchiectasis)
- ✓Pulmonary function tests showing restrictive pattern with reduced diffusion capacity
- ✓Investigation into the cause of fibrosis (occupational history, drug history, autoimmune workup, radiation history)
- ✓High-resolution CT findings and pattern classification (usual interstitial pneumonia, nonspecific interstitial pneumonia, etc.)
- ✓Lung biopsy results if performed
- ✓Oxygen requirements and functional assessment
- ✓Treatment plan (antifibrotic therapy, oxygen, transplant evaluation)
Commonly Confused Codes
J84.112 (Idiopathic pulmonary fibrosis) — specific diagnosis with defined criteria; carries different treatment implicationsJ84.111 (Idiopathic interstitial pneumonia, not otherwise specified) — interstitial pneumonia pattern without specific fibrosisJ70.1 (Chronic pulmonary manifestations due to radiation) — radiation-induced fibrosis has a specific codeJ70.3 (Chronic drug-induced interstitial lung disorders) — drug-induced fibrosis has a specific codeJ63.x-J65 (Pneumoconiosis codes) — occupational dust-related fibrosis has specific codes
Code Hierarchy
└J84Other interstitial pulmonary diseases└J84.1Other interstitial pulmonary diseases with fibrosis└J84.10Pulmonary fibrosis, unspecified
└J84.10Pulmonary fibrosis, unspecified