Emergency: 119
AMDA-IMIC

J18 Pneumonia, unspecified organism

Category / Non-billable header 5 subcodes

Block: Influenza and pneumonia (J09-J18)

Excludes 1 (cannot be coded together)

  • congenital pneumonia (P23.0)
  • drug-induced interstitial lung disorder (J70.2-J70.4)
  • interstitial pneumonia NOS (J84.9)
  • neonatal aspiration pneumonia (P24.-)
  • pneumonitis due to fumes and vapors (J68.0)
  • usual interstitial pneumonia (J84.178)

Excludes 2 (not included here)

  • abscess of lung with pneumonia (J85.1)
  • aspiration pneumonia due to anesthesia during labor and delivery (O74.0)
  • aspiration pneumonia due to anesthesia during pregnancy (O29)
  • aspiration pneumonia due to anesthesia during puerperium (O89.0)
  • aspiration pneumonia due to solids and liquids (J69.-)
  • aspiration pneumonia NOS (J69.0)
  • lipid pneumonia (J69.1)
  • pneumonitis due to external agents (J67-J70)

Code Also

  • , if applicable, any associated condition such as:
  • aspiration pneumonia (J69.-)

Code First

  • , if applicable, associated influenza (J09.X1, J10.0-, J11.0-)

Subcodes

Each subcode links to a detail page with full clinical annotations.

Code Description Billable
J18..0 Bronchopneumonia, unspecified organism Yes
J18..1 Lobar pneumonia, unspecified organism Yes
J18..2 Hypostatic pneumonia, unspecified organism Yes
J18..8 Other pneumonia, unspecified organism Yes
J18..9 Pneumonia, unspecified organism Yes

Plain-language term for this code

The following entry in the US Medical Glossary corresponds to ICD-10-CM category J18:

Last reviewed: September 2026