ICD-10 Code J84.2 – Lymphoid interstitial pneumonia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J84.2 – Lymphoid interstitial pneumonia
What it is
Lymphoid interstitial pneumonia is a rare interstitial lung disease marked by lymphoid cell infiltration of the lung tissue. Use this code for documented LIP, not for other diffuse lung diseases.
Clinical signs
Clinical features vary; refer to documentation. Common references describe cough, shortness of breath, and diffuse pulmonary infiltrates, often with imaging or biopsy support.
When to use this code
Use J84.2 when the provider documents lymphoid interstitial pneumonia as the confirmed diagnosis. It may also fit when the record clearly states LIP-related interstitial lung disease and no more specific code is available. Check documentation for laterality, cause, or associated systemic disease.
Do not use for
Do not use this code for nonspecific interstitial lung disease, pulmonary fibrosis, or pneumonia due to infection. If the chart does not clearly identify LIP, check documentation.
Coding tip
Code from the provider’s stated diagnosis and avoid assuming LIP from imaging alone.