O36.831

Matern care for abnlt of fetal heart rate or rhym, first tri Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester

Matern care for abnlt of fetal heart rate or rhym, first tri Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester: Pregnancy, childbirth and the puerperium (ICD-10-CM O00 to O9A), a category with codes of its own under it.