Unspecified acute lower respiratory infection

This code represents an acute infection affecting the lower respiratory tract, such as the bronchi, bronchioles, or lungs, when the specific type of infection (e.g., bronchitis, pneumonia) is not documented. It indicates an inflammatory process within these structures that has a sudden onset and short duration.

This code is appropriate when documentation clearly indicates an acute lower respiratory infection but lacks specificity regarding the causative organism or precise anatomical location beyond "lower respiratory." It can be used when a provider diagnoses "acute lower respiratory infection, unspecified" or similar terminology without further detail.

• Avoid using this code if a more specific diagnosis, such as acute bronchitis (J20.-) or pneumonia (J18.-), is documented.
• Per Excludes1 note, never code this with acute upper respiratory infection (J06.9).
• Always query the provider for greater specificity if possible, as a more precise diagnosis often leads to better patient care and more accurate reimbursement.