J18
⚠ Non-billable
Pneumonia, unspecified organism
ICD-10-CM · FY2026 · Diseases of the Respiratory System
Code
J18
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Respiratory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code 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)
Excludes2 — not included here, but may code together
- 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
- , if applicable, associated influenza (J09.X1, J10.0-, J11.0-)
Code also
- , if applicable, any associated condition such as:
- aspiration pneumonia (J69.-)
Frequently asked questions
What is ICD-10 code J18?
ICD-10-CM code J18 represents Pneumonia, unspecified organism. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Respiratory System chapter, effective October 1, 2025 – September 30, 2026.
Is J18 billable?
No. J18 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is J18 in?
J18 belongs to the Diseases of the Respiratory System chapter (J00–J99) of ICD-10-CM.
Related codes in the J18 category
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