J84.170 – Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere

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

Billable code

ICD-10-CM code J84.170

Code: J84.170 (claims format: J84170)
Description: Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
Short description: Interstit lung dis w progr fibrotic phenotype dis classd e
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 › J84.1 › J84.17

Notes for J84.170

Applicable to:

Progressive fibrotic interstitial lung disease

Code first:

underlying disease, such as:
lung diseases due to external agents (J60-J70)
rheumatoid arthritis (M05.00-M06.9)
sarcoidosis (D86.-)
systemic connective tissue disorders (M30-M36)

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

J84.1 – Other interstitial pulmonary diseases with fibrosis

Excludes1 (not coded here):

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)

Index terms for J84.170

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

Disease, diseased, lung, interstitial, with progressive fibrotic phenotype, in diseases classified elsewhere

Related codes in J84.17

J84.178 – Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhereBillable

Frequently asked questions

What is ICD-10 code J84.170?

J84.170 is the ICD-10-CM code for interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere, in the block J80-J84 (Other respiratory diseases principally affecting the interstitium).

Is J84.170 a billable code?

Yes. J84.170 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J84.170 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.