Pneumonia due to chlamydia

This code identifies pneumonia caused by an infection with Chlamydia species, most commonly Chlamydia pneumoniae or Chlamydia trachomatis. It represents an inflammatory condition of the lung parenchyma resulting from chlamydial infection, leading to symptoms such as cough, fever, and respiratory distress.

Apply this code when documentation explicitly states a diagnosis of pneumonia and laboratory testing or clinical evidence confirms Chlamydia as the causative organism. This is particularly relevant in cases of atypical pneumonia where other common bacterial or viral causes have been ruled out.

• Ensure the physician's documentation clearly links the pneumonia to a chlamydial infection.
• Do not use this code for pneumonia due to other specified organisms; refer to codes for those specific etiologies.
• Consider co-sequencing with codes for underlying conditions or complications as appropriate.