Coding and coverage · ICD-10-CM

J84 › J84.1

J84.11 Idiopathic interstitial pneumonia

Not billable (header)Chapter 10

Report one of the more specific codes below.

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Codes under this one

  • J84.111 Idiopathic interstitial pneumonia, not otherwise specified
  • J84.112 Idiopathic pulmonary fibrosis
  • J84.113 Idiopathic non-specific interstitial pneumonitis
  • J84.114 Acute interstitial pneumonitis
  • J84.115 Respiratory bronchiolitis interstitial lung disease
  • J84.116 Cryptogenic organizing pneumonia
  • J84.117 Desquamative interstitial pneumonia

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

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • lymphoid interstitial pneumonia (J84.2)
  • pneumocystis pneumonia (B59)

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.