Pneumonia due to other specified infectious organisms

This code signifies pneumonia caused by an infectious agent other than those specifically classified elsewhere (e.g., bacterial, viral, fungal, mycoplasmal, chlamydial, or rickettsial). It represents an inflammatory condition of the lung parenchyma resulting from an identified, but less common, infectious pathogen.

Apply this code when documentation specifies pneumonia due to an unusual or less frequently encountered infectious organism, such as Legionella pneumophila (when not specified as Legionnaires' disease), Nocardia, or Actinomyces. Supporting documentation must clearly identify the specific infectious organism responsible for the pneumonia.

• Ensure the medical record explicitly names the "other specified" infectious organism; avoid using this code for unspecified or unknown pathogens.
• Do not use this code for pneumonia due to bacteria, viruses, fungi, mycoplasma, chlamydia, or rickettsia, as those have more specific codes.
• Always sequence this code after the underlying infectious organism code, if available and applicable (e.g., B47.1 for Nocardiosis followed by J16.8).