J84.11Idiopathic interstitial pneumonia

J84.11 is the ICD-10-CM diagnosis code for idiopathic interstitial pneumonia. It belongs to category J84 (other interstitial pulmonary diseases), block J80-J84 (other respiratory diseases principally affecting the interstitium) and chapter 10 (diseases of the respiratory system). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within J84.1 (other interstitial pulmonary diseases with fibrosis), J84.11 is specifically for idiopathic interstitial pneumonia. Related codes cover pulmonary fibrosis, unspecified (J84.10) and in diseases classified elsewhere (J84.17).

To report this condition, pick the subcode that matches the documentation: J84.111 (not otherwise specified), J84.112 (fibrosis), J84.113 (pneumonitis), J84.114 (pneumonitis), J84.115 (disease), J84.116 (pneumonia) and J84.117 (pneumonia).

Don't report J84.11 together with the conditions in its Excludes1 note: lymphoid interstitial pneumonia (J84.2) and pneumocystis pneumonia (B59).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.