J84.9 – Interstitial pulmonary disease, unspecified

ICD-10-CM 2027 diagnosis code · Other respiratory diseases principally affecting the interstitium

Billable code

ICD-10-CM code J84.9

Code: J84.9 (claims format: J849)
Description: Interstitial pulmonary disease, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 10. Diseases of the respiratory system (J00-J99)
Block: J80-J84 Other respiratory diseases principally affecting the interstitium
Parent codes: J84

Notes for J84.9

Applicable to:

Interstitial pneumonia NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

J84 – Other interstitial pulmonary diseases

Excludes1 (not coded here):

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

Index terms for J84.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in J84

Frequently asked questions

What is ICD-10 code J84.9?

J84.9 is the ICD-10-CM code for interstitial pulmonary disease, unspecified, in the block J80-J84 (Other respiratory diseases principally affecting the interstitium).

Is J84.9 a billable code?

Yes. J84.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J84.9 belong to?

It belongs to category J84 – Other interstitial pulmonary diseases.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.