Infct of amniotic sac and membrns, unsp, third tri, unsp

This code signifies an infection of the amniotic sac and membranes (chorioamnionitis) occurring during the third trimester of pregnancy. The specific type of infection is not identified, and the applicability to the current encounter is unspecified or not applicable.

Use this code when documentation indicates chorioamnionitis in the third trimester without specifying the causative organism or the encounter's relevance to the condition. This is appropriate when the provider notes "chorioamnionitis, unspecified, third trimester" or similar language.

• Ensure the documentation clearly states "third trimester" for accurate trimester assignment.
• Avoid using this code if a specific infectious agent (e.g., bacterial, viral) is identified; instead, code to a more specific O41.1- subcategory.
• This code should be sequenced as a principal diagnosis when it is the primary reason for the encounter, or as a secondary diagnosis when it is a co-morbidity.