All ICD10 Codes
J18Non-billable

Pneumonia, unspecified organism

Diseases of the Respiratory System·Influenza and pneumonia (J09-J18)·category·FY 2026

Use a more specific code (5 billable)
J18.0Bronchopneumonia, unspecified organismJ18.1Lobar pneumonia, unspecified organismJ18.2Hypostatic pneumonia, unspecified organismJ18.8Other pneumonia, unspecified organismJ18.9Pneumonia, unspecified organism

CH10 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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 Code
  • 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)

J09-J18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • allergic or eosinophilic pneumonia (J82)
  • aspiration pneumonia NOS (J69.0)
  • meconium pneumonia (P24.01)
  • neonatal aspiration pneumonia (P24.-)
  • pneumonia due to solids and liquids (J69.-)
  • congenital pneumonia (P23.9)
  • lipid pneumonia (J69.1)
  • rheumatic pneumonia (I00)
  • ventilator associated pneumonia (J95.851)
Use Additional Code
  • code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • 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)
Excludes2(Not included here. Code separately if applicable.)
  • 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 First
Code Also
  • , if applicable, any associated condition such as:
  • aspiration pneumonia (J69.-)

Clinical Hierarchy

BillableHas subcodes
CH10Diseases of the respiratory system (J00-J99)
J09-J18Influenza and pneumonia (J09-J18)
J18Pneumonia, unspecified organismNot billable
J18.0Bronchopneumonia, unspecified organismBillable
J18.1Lobar pneumonia, unspecified organismBillable
J18.2Hypostatic pneumonia, unspecified organismBillable
J18.8Other pneumonia, unspecified organismBillable
J18.9Pneumonia, unspecified organismBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.