A: A translabial ultrasound performed using a probe that is different from that used for a transvaginal ultrasound and that does not enter the vagina is appropriately coded using either a nonobstetrical pelvic or obstetrical ultrasound code.
Translabial or transperineal ultrasound is occasionally performed for determining cervical effacement in a late third trimester pregnancy to check the inferior placental margin without resorting to a transvaginal probe, or to evaluate a labial or perineal mass. Since these indications are all part of a nontransvaginal ultrasound evaluation of the pelvis or a pregnancy, the appropriate pelvic (eg, 76856) or obstetrical ultrasound code (eg, 76805) should be used. If the study is limited to translabial or transperineal scans, and a complete transabdominal study is not performed, the appropriate limited pelvic (eg, 76857) or other limited obstetrical ultrasound code (eg, 76815) should be used. If a complete transabdominal ultrasound of the pelvis or transabdominal obstetrical ultrasound study is also performed, then the respective translabial examination is included and not coded separately.