J18: Pneumonia, unspecified organism
Codes under J18 (Pneumonia, unspecified organism). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| J18.0 | Bronchopneumonia, unspecified organism | ✓ |
| J18.0 | Bronchopneumonia, unspecified organism | ✓ |
| J18.1 | Lobar pneumonia, unspecified organism | ✓ |
| J18.1 | Lobar pneumonia, unspecified organism | ✓ |
| J18.2 | Hypostatic pneumonia, unspecified organism | ✓ |
| J18.2 | Hypostatic pneumonia, unspecified organism | ✓ |
| J18.8 | Other pneumonia, unspecified organism | ✓ |
| J18.8 | Other pneumonia, unspecified organism | ✓ |
| J18.9 | Pneumonia, unspecified organism | ✓ |
| J18.9 | Pneumonia, unspecified organism | ✓ |
Frequently asked questions
What is ICD-10-CM code J18?
J18 is an ICD-10-CM category covering Pneumonia, unspecified organism. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is J18 a billable code?
No — J18 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example J18.0 — Bronchopneumonia, unspecified organism). 10 of the 10 codes under J18 are billable.
What codes fall under J18?
J18 includes J18.0, J18.0, J18.1, J18.1, J18.2, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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