J18 ICD-10-CM Code: Pneumonia, unspecified organism
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
J18Pneumonia, unspecified organism
ICD-10-CM diagnosis code · United States clinical modification
Where J18 sits
- 1
Chapter 10
Diseases of the respiratory system (J00-J99)
- 2
Section
Influenza and pneumonia (J09-J18)
- 3
Category J18
Pneumonia, unspecified organism
- 4
Code J18
Pneumonia, unspecified organism
Codes under J18
J18 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for J18.
Code first
- , if applicable, associated influenza (J09.X1, J10.0-, J11.0-)
Use additional code
No “use additional code” instruction is listed for J18.
Excludes1
Conditions that should not be reported together with this 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
Conditions not included here that may be reported separately when present.
- 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)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code J18 mean?
J18 is the FY 2027 U.S. ICD-10-CM code for “Pneumonia, unspecified organism.”
Is J18 a billable or specific ICD-10-CM code?
No. J18 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is J18 located in ICD-10-CM?
J18 is listed in Chapter 10, Diseases of the respiratory system (J00-J99), within Influenza and pneumonia (J09-J18) (J09–J18), under category J18, Pneumonia, unspecified organism.
What coding notes are listed for J18?
No inclusion terms are listed for J18 in this reference record. Code-first instructions: , if applicable, associated influenza (J09.X1, J10.0-, J11.0-). Excludes1 notes: 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 notes: 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).