For routine prenatal outpatient visits for patients with high-risk pregnancies, a code from category O09 (supervision of high-risk pregnancy) should be reported as the first listed diagnosis on the claim., Codes from category O09, Supervision of high-risk pregnancy, are intended for use only during the prenatal period. For complications during the labor or delivery episode as a result of a high-risk pregnancy, assign the applicable complication codes from Chapter 15., For routine prenatal outpatient visits for patients with high-risk pregnancies, a code from category O09 (supervision of high-risk pregnancy) should be reported as the first listed diagnosis on the claim., These codes should not be used in conjunction with chapter 15 codes. Supervision of High-Risk Pregnancy. For routine prenatal outpatient visits for patients with high-risk pregnancies, Codes from category O09, Supervision of high-risk pregnancy, are intended for use only during the prenatal period., Codes from category O09, Supervision of high-risk pregnancy, are intended for use only during the prenatal period. For complications during the labor or delivery episode as a result of a high-risk pregnancy, assign the applicable complication codes from Chapter 15., For routine prenatal outpatient visits for patients with high-risk pregnancies, a code from category O09, Supervision of high-risk pregnancy, should be used as the first-listed diagnosis. Secondary chapter 15 codes may be used in conjunction with these codes if appropriate..