J84.9
BillableInterstitial pulmonary disease, 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
A lung disease involving inflammation or scarring of the lung tissue, but the specific type has not been determined or documented.
Coding Tips
- •This is the least specific code; use only when the type of interstitial lung disease cannot be determined from documentation
- •Query the provider for more specific diagnosis to allow for more precise coding
Clinical Significance
Interstitial pulmonary disease unspecified is the least specific ILD code and indicates that the medical record does not identify the type of interstitial lung disease. While it still captures HCC value, its use represents a missed opportunity for more specific coding. This code should trigger a provider query to determine if additional clinical information can support a more specific diagnosis.
Documentation Requirements
- ✓Documentation that the patient has interstitial lung disease, even if the specific type is not determined
- ✓Imaging evidence of interstitial lung disease (chest CT or chest X-ray)
- ✓Documentation of why the specific type cannot be determined (pending workup, limited records, etc.)
- ✓Pulmonary function tests if available
- ✓Evidence that a provider query was attempted to obtain more specific diagnostic information
Commonly Confused Codes
J84.89 — Other specified interstitial pulmonary diseases should be used when the type IS known but lacks a specific codeJ84.112 — Idiopathic pulmonary fibrosis and other specific ILD codes should always be used preferentiallyJ84.10 — Pulmonary fibrosis unspecified is more specific if fibrosis is documentedJ98.4 — Other disorders of lung is a different category for non-interstitial lung conditions
Code Hierarchy
└J84Other interstitial pulmonary diseases└J84.9Interstitial pulmonary disease, unspecified
└J84.9Interstitial pulmonary disease, unspecified