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J84.170

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

Billable / specific codeICD-10-CM

J84.170 is a billable, specific ICD-10-CM code for interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere. It is valid for submission on a claim.

Check J84.170 with the rest of the claim: free scrubber

Code first

The underlying condition must be sequenced before this code.

  • 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)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Progressive fibrotic interstitial lung disease

Excludes1 inherited from the categories above J84.170

A category’s note binds every code beneath it.

Written on J84.1: Other interstitial pulmonary diseases with fibrosis

  • pulmonary fibrosis (chronic) following radiation (J70.1)

Written on J84: Other interstitial pulmonary diseases

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

Excludes2 inherited from the categories above J84.170

Not part of this code, but both may be coded when both are present.

Written on J84: Other interstitial pulmonary diseases

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

Risk adjustment

J84.170 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 278 Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis0.818 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

J84.170 is named in 14 Medicare coverage policies: 14 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55639Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions
  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
  • A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
  • A56730Billing and Coding: Respiratory Therapy and Oximetry Services

Alphabetic index entries that lead here

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

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under J84.17

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.