Hypostatic pneumonia, unspecified organism

This code describes pneumonia that develops due to prolonged immobility, often seen in bedridden or debilitated patients, leading to fluid accumulation and infection in the lungs. It specifically indicates that the causative microorganism has not been identified.

Assign this code when documentation clearly states "hypostatic pneumonia" without specifying the infectious agent. This is common in cases where cultures are not performed or are inconclusive. It is frequently seen in patients with chronic conditions requiring extended bed rest or those recovering from major surgery.

• Do not use this code if a specific organism (e.g., bacterial, viral) is documented; instead, code to the specific organism.
• Consider sequencing this code after a primary diagnosis that led to the patient's immobility (e.g., stroke, fracture).
• Ensure documentation supports the "unspecified organism" aspect; if an organism is suspected but not confirmed, query the provider.