J84.112 Idiopathic pulmonary fibrosis

Billable ICD-10-CM code, FY2026.

Applicable to

• Cryptogenic fibrosing alveolitis
• Idiopathic fibrosing alveolitis

Applies from J84 Other interstitial pulmonary diseases

Excludes1 (never code together)

• drug-induced interstitial lung disorders (J70.2-J70.4)
• interstitial emphysema (J98.2)

Excludes2 (not included here)

• lung diseases due to external agents (J60-J70)

Code also

• , if applicable, associated condition

Applies from J84.1 Other interstitial pulmonary diseases with fibrosis

Excludes1 (never code together)

• pulmonary fibrosis (chronic) following radiation (J70.1)

Code also

• , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)

Applies from J84.11 Idiopathic interstitial pneumonia

Excludes1 (never code together)

• lymphoid interstitial pneumonia (J84.2)
• pneumocystis pneumonia (B59)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 278 — Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis
• CMS-HCC V22: HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders
• RxHCC V08: HCC 226 — Idiopathic Pulmonary Fibrosis and Systemic Sclerosis with Lung Involvement
• ESRD V24: HCC 112

MS-DRG index

Defines the logic of DRG(s) 196-198 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 516.31 Idiopathic pulmonary fibrosis

Code annotations containing back-references to J84.112

Back-references to J84.11

• Use Additional: M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] ("idiopathic interstitial pneumonia (J84.11-)")

Back-references to J84

• Code Also: I27.23 Pulmonary hypertension due to lung diseases and hypoxia ("interstitial lung disease (J84.-)")

Diagnosis Index entries for J84.112

• Alveolitis › fibrosing (cryptogenic) (idiopathic)
• Fibrosis, fibrotic › lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) › idiopathic
• Fibrosis, fibrotic › pulmonary › idiopathic
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › interstitial › usual
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › interstitial › usual › idiopathic

Nearby codes

• J84.09 Other alveolar and parieto-alveolar conditions
• J84.1 Other interstitial pulmonary diseases with fibrosis
• J84.10 Pulmonary fibrosis, unspecified
• J84.11 Idiopathic interstitial pneumonia
• J84.111 Idiopathic interstitial pneumonia, not otherwise specified
• J84.112 Idiopathic pulmonary fibrosis (this code)
• J84.113 Idiopathic non-specific interstitial pneumonitis
• J84.114 Acute interstitial pneumonitis
• J84.115 Respiratory bronchiolitis interstitial lung disease
• J84.116 Cryptogenic organizing pneumonia
• J84.117 Desquamative interstitial pneumonia