J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
Is J84.170 billable?
Yes — J84.170 is billable for FY2027. J84.170 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. J84.170 may be submitted for encounters from October 1, 2026 through September 30, 2027.
J84.170 at a glance
| Code | J84.170 |
|---|---|
| Description | Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to J84.170?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name J84.170 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does J84.170 group to?
J84.170 sits in MDC 04 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 196Interstitial Lung Disease with MCCmedical
- 197Interstitial Lung Disease with CCmedical
- 198Interstitial Lung Disease without CC/MCCmedical
How is J84.170 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to J84.170. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disease, diseased › lung › interstitial › with progressive fibrotic phenotype, in diseases classified elsewhere
Code first
The underlying condition below must be sequenced before J84.170. J84.170 describes a manifestation and cannot be the principal or first-listed diagnosis.
Inclusion terms
Alternative wording in documentation that is classified to J84.170.
- Progressive fibrotic interstitial lung disease
Excludes1 — never code together — inherited from J84
The conditions below can never be reported together with J84.170 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from J84.1
The conditions below can never be reported together with J84.170 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- pulmonary fibrosis (chronic) following radiation (J70.1)
Use additional code — inherited from Chapter 10
Report an additional code alongside J84.170 to fully describe the condition. J84.170 is sequenced first.
Excludes2 — not included here — inherited from Chapter 10
The conditions below are not part of J84.170, but a patient may have both at the same time. When documentation supports it, J84.170 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- smoke inhalation (T59.81-)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from J84
The conditions below are not part of J84.170, but a patient may have both at the same time. When documentation supports it, J84.170 and the excluded code may both be reported.
- lung diseases due to external agents (J60-J70)
Code also — inherited from J84
Two codes may be needed to describe the condition fully. Whether J84.170 is sequenced first depends on the reason for the encounter.
- , if applicable, associated condition
Code also — inherited from J84.1
Two codes may be needed to describe the condition fully. Whether J84.170 is sequenced first depends on the reason for the encounter.
- , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
How long has J84.170 existed?
J84.170 first appears in FY2021 (FY2020 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.