J84.112

Billable

Idiopathic pulmonary fibrosis

HCC Category Mapping

V28HCC 278 — Fibrosis of Lung and Other Chronic Lung Disorders

1.091

V24HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders

0.268

ESRDHCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders

0.000

RxHCCHCC 226 — Fibrosis of Lung and Other Chronic Lung Disorders

0.000

What This Code Means

A progressive lung disease of unknown cause where lung tissue becomes scarred and stiff, making breathing increasingly difficult.

Coding Tips

•This is a specific diagnosis requiring clinical, radiological, and often pathological confirmation
•Document disease progression and functional status for treatment planning

Clinical Significance

Idiopathic pulmonary fibrosis is a progressive, fatal lung disease with a median survival of 3-5 years from diagnosis, making it one of the highest-acuity interstitial lung diseases. This diagnosis carries exceptional weight in risk adjustment due to the intensive resource utilization including antifibrotic therapy (nintedanib, pirfenidone), frequent monitoring, oxygen therapy, and potential lung transplant evaluation. Accurate capture is critical for reflecting the true severity burden of these patients.

Documentation Requirements

✓High-resolution computed tomography showing usual interstitial pneumonia pattern OR surgical lung biopsy confirmation
✓Pulmonologist documentation confirming idiopathic pulmonary fibrosis diagnosis with exclusion of known causes
✓Pulmonary function test results showing restrictive pattern with reduced diffusion capacity
✓Disease severity and progression documented (forced vital capacity trend, oxygen requirements)
✓Current treatment plan including antifibrotic therapy, supplemental oxygen, and transplant evaluation status

Commonly Confused Codes

J84.111 — Idiopathic interstitial pneumonia NOS is used when the specific IIP subtype is NOT determined; IPF (J84.112) is a distinct entity with UIP pattern J84.170 — Interstitial lung disease with progressive fibrotic phenotype is used for progressive fibrosis in OTHER diseases classified elsewhere, not primary IPF J84.10 — Pulmonary fibrosis unspecified does NOT map to the same high-severity HCC and should not be used when IPF is documented J84.113 — NSIP has a better prognosis than IPF and distinct imaging/pathology pattern

Code Hierarchy

└J84Other interstitial pulmonary diseases └J84.1Other interstitial pulmonary diseases with fibrosis └J84.11Idiopathic interstitial pneumonia └J84.112Idiopathic pulmonary fibrosis

└J84.112Idiopathic pulmonary fibrosis