Syphilis complicating pregnancy, second trimester

This code signifies a maternal diagnosis of syphilis occurring during the second trimester of pregnancy. It indicates that the syphilitic infection is considered a complication impacting the current gestation.

Apply this code when a pregnant patient in her second trimester is diagnosed with syphilis, and the provider explicitly documents the infection as complicating the pregnancy. Documentation should clearly state the trimester and the presence of syphilis.

• Always sequence this code as a secondary diagnosis following the appropriate pregnancy code (e.g., O09.-).
• Ensure the medical record specifies "second trimester" for accurate code assignment.
• Do not use this code if syphilis is diagnosed postpartum or if it's not documented as complicating the pregnancy.