Thought that might get you in here! :)
DD's birth was at an MTF (Womack at Bragg - very nice facility!), and we saw the midwife clinic there all through. We had the 20w ultrasound and that's it. Totally fine with that policy.
I'm 12w along with #2 and stationed >50 miles away from the nearest MTF, so we're on Tricare Prime Remote (basically same as Prime w/ no copays, and don't have to use an MTF). I went to my first appt with an OB yesterday and they wanted to do an ultrasound. I told them my ins. does not cover 1st tri and they kinda freaked out and said "how can we confirm the pregnancy without an u/s?" "Uhh, with a blood test and external exam?" (helloooo, 2nd time around, I'm clearly showing uterine swell!)
So DH and I, separately, call Tricare to inquire and are both told that they cover zero ultrasounds. Without medical necessity. Said that if we got one with #1, it was because the MTF gave them, not because of Tricare.
And so it is:
I haven't told my friends IRL who had kids with private providers, and I'd like to ask them, but I guess they all got their providers to submit medical codes of "poor fundal height growth" and other fake diagnoses to get their u/s? Sheesh.