Alphabetic Index FY2027

J84.11

Idiopathic interstitial pneumonia

FY2027Chapter 10: Diseases of the respiratory system/J80–J84 Other respiratory diseases principally affecting the interstitium

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

J84.11 is a non-billable ICD-10-CM code header for idiopathic interstitial pneumonia. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are 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 and 3 more. Its coding notes include a Use additional code instruction, a Code also instruction, 5 Excludes1 entries and 10 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (7 notes)
Inherited from Chapter 10 Diseases of the respiratory system
  • 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)

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

Inherited from J84.1 Other interstitial pulmonary diseases with fibrosis
  • , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
Inherited from J84 Other interstitial pulmonary diseases
  • , if applicable, associated condition

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • lymphoid interstitial pneumonia (J84.2)
  • pneumocystis pneumonia (B59)
Inherited from J84.1 Other interstitial pulmonary diseases with fibrosis
  • pulmonary fibrosis (chronic) following radiation (J70.1)
Inherited from J84 Other interstitial pulmonary diseases
  • drug-induced interstitial lung disorders (J70.2-J70.4)
  • interstitial emphysema (J98.2)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from J84 Other interstitial pulmonary diseases
  • lung diseases due to external agents (J60-J70)
Also from chapter/block level (9 notes)
Inherited from Chapter 10 Diseases of the respiratory system
  • 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)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 10 Diseases of the respiratory system
  • 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).

More specific codes under J84.11 7