Pelvis or abdomen, pregnancy‑related or pregnancy complication, fetal development and anatomy, ultrasound (the current ultrasound) scan of, by any or all approaches, for determining the structure, gestation, location, viability or number of fetuses, if: (a) the dating of the pregnancy (as confirmed by the current ultrasound) is 12 to 16 weeks of gestation; and (b) the current ultrasound is not performed on the same patient within 24 hours of a service mentioned in another item in this Subgroup (R)