I am pretty sure that is incorrect. This is ACOG documentation.
For limited ultrasounds, CPT says to report 76815 once, regardless of the number of fetuses. Similarly, report 76817 only once for transvaginal ultrasound, even when there is more than one gestation.
"The reason for that is that in order to bill this code, the ObGyn must examine the fetus, uterus and other maternal pelvic structures," Rasmussen says. "Even when the ObGyn looks at each fetus separately using this approach, you can only bill the code once because only one evaluation of the uterus, cervix and other maternal structures is performed."