I'm occasionally hearing Med 2 being dispatched, but they are responding from the Desoto Heliport. Some time ago, while having lunch at Ojedas in Desoto, which is just west of the heliport, I saw one PHI bird lifting off. I was in the restaurant, so no scanner handy. The Flightradar app showed him heading off towards the northeast part of Dallas County, though I did not 'follow along' to his destination. Upon leaving the restaurant, I circled around to get a better view of the facility. There were two additional PHI copters on the apron outside of the hanger area.
See this previous
post and the attached picture. (It's from my phone, so not as clear & detailed as I like, but traffic was coming up behind me.)