Supervision of other high risk pregnancies, first trimester

This code signifies the ongoing medical oversight of a pregnant patient during her first trimester (up to 13 weeks and 6 days gestation) who has a pre-existing condition or develops a complication that places her pregnancy at a higher risk than a routine pregnancy, but is not specifically classified elsewhere. This includes conditions like advanced maternal age, grand multiparity, or a history of adverse pregnancy outcomes.

Apply this code when a patient in her first trimester requires increased monitoring due to a high-risk factor not covered by more specific O09 codes (e.g., O09.1- for age, O09.2- for poor obstetric history). Documentation should clearly state the high-risk factor and confirm the first-trimester gestational age. This code is used for the supervision itself, not for the treatment of the underlying high-risk condition.

• Always sequence this code as a primary diagnosis when the sole reason for the encounter is supervision of the high-risk pregnancy.
• Do not use this code if a more specific O09 subcategory exists for the patient's particular high-risk condition (e.g., O09.211 for supervision of pregnancy with history of ectopic pregnancy, first trimester).
• Ensure the medical record explicitly states "first trimester" or provides gestational age that falls within the first trimester to support its use.