Turns out "prenatal maternity care" is simply defined as the blood pressure, weight, and fundal measurements. That's all that bullet point means.
* Ultrasound? Well, that's different. It's a lab procedure. Yep, even the 20-week "standard" anatomy scan.
* Get a non-stress test done (literally just 10 minutes worth of heart-rate monitoring)? Then it becomes a "specialist visit." You'll pay for that.
* Get any bloodwork done? Even if it's for the mother's health and not trying to do some sort of pre-natal screening? It's a diagnostic lab procedure.
* Urine samples for pre-eclampsia? Diagnostic testing.
* Mandatory (state-required) STD panel? That's diagnostic testing, too.
Turns out the ACA requires "pre-natal care" to be covered, so bragging about it in the first place is just absurd.