Lobar pneumonia, unspecified organism

This code signifies an acute inflammatory process affecting a distinct lobe of the lung, where the specific causative microorganism has not been identified. It represents a form of pneumonia characterized by consolidation of an entire lobe or a significant portion thereof.

Use this code when documentation clearly states "lobar pneumonia" but does not specify the bacterial, viral, or fungal pathogen responsible. This is appropriate when cultures are pending, inconclusive, or not performed.

• Do not use if the organism is identified; instead, code to the specific organism (e.g., J13 for pneumococcal pneumonia).
• Ensure the documentation explicitly states "lobar" pneumonia; otherwise, consider other unspecified pneumonia codes like J18.9.
• Always review for any associated conditions or complications that may require additional coding.