J84.114 Acute interstitial pneumonitis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Hamman-Rich syndrome

Excludes1 (never code together)

• pneumocystis pneumonia (B59)

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 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders
• CMS-HCC V22: HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders
• RxHCC V08: HCC 227 — Pulmonary Fibrosis, Except Idiopathic
• ESRD V24: HCC 112

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 516.33 Acute interstitial pneumonitis

Code annotations containing back-references to J84.114

Back-references to J84.114

• Type 1 Excludes: J98.4 Other disorders of lung ("acute interstitial pneumonitis (J84.114)")

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 J84.114

• Fibrosis, fibrotic › lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) › diffuse (idiopathic) › interstitial › acute
• Hamman-Rich syndrome
• Pneumonitis (acute) (primary) › interstitial (chronic) › acute
• Syndrome › acute respiratory distress (adult) (child) › idiopathic
• Syndrome › respiratory › distress › acute › idiopathic

Nearby codes

• J84.10 Pulmonary fibrosis, unspecified
• J84.11 Idiopathic interstitial pneumonia
• J84.111 Idiopathic interstitial pneumonia, not otherwise specified
• J84.112 Idiopathic pulmonary fibrosis
• J84.113 Idiopathic non-specific interstitial pneumonitis
• J84.114 Acute interstitial pneumonitis (this code)
• J84.115 Respiratory bronchiolitis interstitial lung disease
• J84.116 Cryptogenic organizing pneumonia
• J84.117 Desquamative interstitial pneumonia
• J84.17 Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere
• J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere