J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
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.
Code first
The underlying condition must be sequenced before this code.
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
These are not written on J84.170, but they bind it: a note on a category applies to every code beneath it. Billing J84.170 with anything listed here is a denial.
Excludes2 inherited from the categories above J84.170
Also inherited, and the opposite of Excludes1: these conditions are not part of J84.170, but a patient can have both, so you may code both.
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.
Medicare coverage
J84.170 is named in 14 Medicare coverage policies — 14 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- 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
How J84.170 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to J84.170.
- Disease, diseased›lung›interstitial›with progressive fibrotic phenotype, in diseases classified elsewhere
Code history
J84.170 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share J84.17. If J84.170 is not quite right, the correct code is usually one of these.
Questions about J84.170
- Is J84.170 a billable ICD-10-CM code?
- Yes. J84.170 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J84.170 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Other respiratory diseases principally affecting the interstitium (J80-J84).
- What cannot be coded together with J84.170?
- J84.170 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above J84.170 (J84.1, J84) and apply to it just the same.