Can bill cpt code 76856 with dx 626.4?

CPT code 76856 refers to a transvaginal ultrasound examination of the female pelvis. Diagnosis code 626.4 pertains to "menstrual irregularities." It is generally acceptable to bill for these codes together if the ultrasound is medically necessary for evaluating the menstrual irregularities. However, it's important to ensure that the documentation supports the medical necessity and that payer guidelines are followed.