Supervision of other high risk pregnancies, second trimester

This code signifies ongoing medical oversight for a pregnancy in the second trimester (weeks 14 through 27+6 days) that is complicated by a high-risk factor not specified elsewhere. This includes conditions such as advanced maternal age, grand multiparity, or a history of obstetric complications that necessitate closer monitoring. The supervision aims to mitigate potential adverse outcomes for both mother and fetus.

Assign this code when a pregnant patient in her second trimester requires specialized antenatal care due to a high-risk condition that doesn't have a more specific O09 subcategory. Documentation should clearly indicate the high-risk factor (e.g., "supervision of pregnancy complicated by advanced maternal age, second trimester") and the trimester of care. This code is appropriate for routine visits where the primary focus is managing the identified risk.

• Always sequence this code as a secondary diagnosis, with the specific high-risk condition (e.g., O09.52 for advanced maternal age) coded first.
• Do not use this code if a more specific O09 subcategory exists for the documented high-risk condition (e.g., O09.12 for supervision of pregnancy in adolescent, second trimester).
• Ensure the medical record explicitly states "second trimester" or provides gestational age that falls within the second trimester to support accurate trimester assignment.