Pneumonia, unspecified organism

This code represents an acute inflammatory condition of the lung parenchyma, characterized by consolidation and impaired gas exchange, where the specific causative microorganism has not been identified. It indicates a general diagnosis of pneumonia without specifying bacterial, viral, fungal, or other etiologies.

This code is appropriate when a patient presents with clinical and radiological evidence of pneumonia, but diagnostic testing (e.g., sputum culture, blood culture, viral panel) has not been performed, is pending, or has yielded inconclusive results regarding the causative agent. It is used when the provider documents "pneumonia, unspecified" or "pneumonia, organism unknown."

• Avoid using this code if the organism is known or can be reasonably inferred from the documentation (e.g., "bacterial pneumonia").
• Always review the entire medical record for more specific documentation of the organism before assigning this code.
• Consider sequencing this code after any underlying conditions that predispose to pneumonia, if applicable.