ICD-10-CM
ICD-10 code for Pneumonia: J18.9
The ICD-10-CM index points "Pneumonia" to J18.9, Pneumonia, unspecified organism. J18.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- J12.822019 (novel) coronavirus, Pneumonia due to coronavirus disease 2019Billable
- J12.0adenoviral, Adenoviral pneumoniaBillable
- J18.2adynamic, Hypostatic pneumonia, unspecified organismBillable
- A50.04alba, Early congenital syphilitic pneumoniaBillable
- J82.89allergic, Other pulmonary eosinophilia, not elsewhere classifiedBillable
- J15.8anaerobes, Pneumonia due to other specified bacteriaBillable
- A22.1anthrax, Pulmonary anthraxBillable
- B77.81Ascaris, Ascariasis pneumoniaBillable
- J69.0aspiration, Pneumonitis due to inhalation of food and vomitBillable
- J18.9atypical NEC, Pneumonia, unspecified organismBillable
- J15.9bacillus, Unspecified bacterial pneumoniaBillable
- J15.9bacterial, Unspecified bacterial pneumoniaBillable
- J15.8Bacteroides (fragilis) (oralis) (melaninogenicus), Pneumonia due to other specified bacteriaBillable
- J84.89bronchiolitis obliterans organized (BOOP), Other specified interstitial pulmonary diseasesBillable
- J18.0broncho-, bronchial (confluent) (croupous) (diffuse) (disseminated) (hemorrhagic) (involving lobes) (lobar) (terminal), Bronchopneumonia, unspecified organismBillable
- J15.8Butyrivibrio (fibriosolvens), Pneumonia due to other specified bacteriaBillable
- B37.1Candida, Pulmonary candidiasisBillable
- J16.0chlamydial, Chlamydial pneumoniaBillable
- J84.89cholesterol, Other specified interstitial pulmonary diseasesBillable
- J15.8Clostridium (haemolyticum) (novyi), Pneumonia due to other specified bacteriaBillable
- P23.9congenital (infective), Congenital pneumonia, unspecifiedBillable
- J12.82coronavirus (novel) (disease) 2019, Pneumonia due to coronavirus disease 2019Billable
- J12.82COVID-19, Pneumonia due to coronavirus disease 2019Billable
- J84.116cryptogenic organizing, Cryptogenic organizing pneumoniaBillable
- B25.0cytomegalic inclusion, Cytomegaloviral pneumonitisBillable
- B25.0cytomegaloviral, Cytomegaloviral pneumonitisBillable
- J84.117desquamative interstitial, Desquamative interstitial pneumoniaBillable
- J13diplococcal, diplococcus (broncho-) (lobar), Pneumonia due to Streptococcus pneumoniaeBillable
- J15.7Eaton's agent, Pneumonia due to Mycoplasma pneumoniaeBillable
- J15.69Enterobacter, Pneumonia due to other Gram-negative bacteriaBillable
- J82.81eosinophilic, Chronic eosinophilic pneumoniaBillable
- J15.5Escherichia coli (E. coli), Pneumonia due to Escherichia coliBillable
- J15.8Eubacterium, Pneumonia due to other specified bacteriaBillable
- J15.0Friedländer's bacillus, Pneumonia due to Klebsiella pneumoniaeBillable
- J15.8Fusobacterium (nucleatum), Pneumonia due to other specified bacteriaBillable
- J85.0gangrenous, Gangrene and necrosis of lungBillable
- B05.2giant cell (measles), Measles complicated by pneumoniaBillable
- A54.84gonococcal, Gonococcal pneumoniaBillable
- J15.69gram-negative bacteria NEC, Pneumonia due to other Gram-negative bacteriaBillable
- J14Hemophilus influenzae (broncho) (lobar), Pneumonia due to Hemophilus influenzaeBillable
More specific codes in J18
A header groups codes and is not billed. A billable code is one you can report.
Code first
The CDC tabular list says to report the code named here before this one.
From J18. A note on a category applies to every code under it.
Code first, if applicable, associated influenza (J09.X1, J10.0-, J11.0-)
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From J18. A note on a category applies to every code under it.
Code also, if applicable, any associated condition such as:
Excludes1
Excludes1 means these codes are not reported together.
From J18. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From J18. A note on a category applies to every code under it.
- J85.1Abscess of lung with pneumonia
- O74.0Aspiration pneumonia due to anesthesia during labor and delivery
- O29Aspiration pneumonia due to anesthesia during pregnancy
- O89.0Aspiration pneumonia due to anesthesia during puerperium
- J69.-Aspiration pneumonia due to solids and liquids
- J69.0Aspiration pneumonia NOS
- J69.1Lipid pneumonia
- J67-J70Pneumonitis due to external agents
Related conditions
Related pages
- J18.9 code detailsNotes, nearby codes, CMS-HCC group
- Category J18Every code under it
- Chapter 10Diseases of the respiratory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Pneumonia?
The ICD-10-CM index points "Pneumonia" to J18.9, Pneumonia, unspecified organism. J18.9 is a billable code.
Is J18.9 billable?
Yes. J18.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to J18.9?
The CDC tabular list gives 6 Excludes1 notes (not coded together), 8 Excludes2 notes (may be coded together when both are documented) for J18.9 and the categories above it. They are listed on this page.
What chapter is J18.9 in?
Chapter 10. Diseases of the respiratory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.