All ICD10 Codes
J84Not billable, use a more specific code below

Other interstitial pulmonary diseases

In Other respiratory diseases principally affecting the interstitium (J80-J84), chapter 10: Diseases of the Respiratory System

24 billable codes under J84: 6 are an MCC, 10 are a CC; 19 map to HCC 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders), HCC 278 (Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Excludes1: not coded here, use a different code

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

Excludes2: not included here, code separately if applicable

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

Code also: add a code for this too, order depends on the encounter

  • if applicable, associated condition

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers COPD and asthma exacerbations, sequencing of acute respiratory failure, confirmed versus suspected identified influenza, ventilator associated pneumonia, and vaping-related disorders.

Read Section I.C.10 (page 56)

All codes under J84

J84 can't be used on a claim. Pick a billable code below; grey headings group them.

J84 MS-DRGs

As the principal diagnosis, the billable codes under J84 group to MS-DRG 196, 197, 198, 791, or 793 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to J84

Notes on these codes point to J84.

  • I27.23 Code Also: interstitial lung disease (J84.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Interstitial Lung Diseases

Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis.

Read more about interstitial lung diseases on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.