Non-Billable / Non-Specific Code
ICD-10-CM J18 is the diagnosis code for Pneumonia, unspecified organism. This code falls under the section "Influenza and pneumonia" within Chapter 10 â Diseases of the respiratory system (J00-J99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as J18. They are mutually exclusive:
The following conditions are not included in J18. If the patient has both, code each condition separately:
Understanding where J18 sits in the ICD-10-CM classification helps ensure proper coding:
No, J18 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
J18 is the ICD-10-CM diagnosis code for "Pneumonia, unspecified organism". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
J18 is located in Section J09-J18 â "Influenza and pneumonia" within Chapter 10 of the ICD-10-CM Tabular List.
J18 has 5 sub-code(s) that provide more specific detail: J18.0, J18.1, J18.2, J18.8, J18.9.
Use J18 when the patients documented diagnosis matches "Pneumonia, unspecified organism" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Pneumonia, unspecified organism is J18.
No, J18 is non-billable. Use a more specific sub-code for primary diagnosis billing.
J18 is in Chapter 10 of the ICD-10-CM Tabular List.
Type 1 Excludes for J18 include: congenital pneumonia (P23.0); drug-induced interstitial lung disorder (J70.2-J70.4); interstitial pneumonia NOS (J84.9) and more.
Yes, J18 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.