ICD-10-CM J18.9 is the diagnosis code for Pneumonia, unspecified organism. This code falls under the section "Influenza and pneumonia" within Chapter 10 — Diseases of the respiratory system (J00-J99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where J18.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, J18.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
J18.9 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.
The parent code of J18.9 is J18 ("Pneumonia, unspecified organism"). J18.9 provides a more specific classification within this category.
J18.9 is located in Section J09-J18 — "Influenza and pneumonia" within Chapter 10 of the ICD-10-CM Tabular List.
Use J18.9 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 J18.9.
Yes, J18.9 can be used as a primary diagnosis code since it is billable and specific.
J18.9 is in Chapter 10 of the ICD-10-CM Tabular List.
Yes, J18.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.