J18

Non-billable

Pneumonia, unspecified organism

J18 is the ICD-10-CM code for Pneumonia, unspecified organism. It is a non-billable category code — use a more specific child code such as J18.0 for billing.

Status
Header (non-billable)
Chapter
J00-J99
Subcodes
5
Edition
FY2026

J00-J99 Diseases of the respiratory system

Excludes1 — not coded here

  • 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

  • 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

Notes

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

Frequently asked questions

What is ICD-10 code J18?
J18 is the ICD-10-CM code for "Pneumonia, unspecified organism". It falls under J00-J99 Diseases of the respiratory system.
Is J18 a billable code?
No — J18 is a non-billable header code. Use a more specific child code (such as J18.0) for billing.
What are the subcodes of J18?
J18 has 5 more specific child codes, including J18.0, J18.1, J18.2.
What is excluded from J18?
Excludes1 (not coded here): congenital pneumonia (P23.0); drug-induced interstitial lung disorder (J70.2-J70.4); interstitial pneumonia NOS (J84.9); neonatal aspiration pneumonia (P24.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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