Coding and coverage · ICD-10-CM

J84 › J84.1 › J84.17

J84.178 Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere

BillableCMS-HCC V28: HCC 280Chapter 10
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Instructional notes

Chapter 10

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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)
Use additional codeAdd a second code for the full picture.
  • code, where applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)
Notes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

J84

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • drug-induced interstitial lung disorders (J70.2-J70.4)
  • interstitial emphysema (J98.2)
Excludes2Not included here: the patient may have both; report both when both are present.
  • lung diseases due to external agents (J60-J70)
Code also
  • , if applicable, associated condition

J84.1

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • 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)

This code

Code firstSequence the underlying condition first.
  • underlying disease, such as:
  • progressive systemic sclerosis (M34.0)
  • rheumatoid arthritis (M05.00-M06.9)
  • systemic lupus erythematosis (M32.0-M32.9)
Inclusion terms
  • Interstitial pneumonia (nonspecific) (usual) due to collagen vascular disease
  • Interstitial pneumonia (nonspecific) (usual) in diseases classified elsewhere
  • Organizing pneumonia due to collagen vascular disease
  • Organizing pneumonia in diseases classified elsewhere

Chapter 10: Diseases of the respiratory system · J80-J84 Other respiratory diseases principally affecting the interstitium (J80-J84)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.