No, you shouldn't have to use some special software to take a picture. Taking a photo with your phone's camera app should never trigger an account suspension.
I'm sort of surprised you haven't encountered it yet (and that the people writing responses to your comment haven't either).
Here's a PR piece about their secure video chat feature. (They also support emailing around photos, and the app has a built in camera, but that's old news, and not in their PR blog reel)
https://www.epic.com/epic/post/expanding-telehealth-during-t...
They are doing some interesting stuff with outpatient monitoring and treatment-specific workflows, apparently:
The health sector isn't known for having a secure anything, furthermore getting health companies to agree on one thing together is almost impossible.
Besides, there is less likely of a chance that a medical app targeted toward virtual care for babies would be flagging parents for sending pictures of their children to a doctor.
They required me to send them photos to the receptionist over plain email - I complied because they weren't particularly sensitive parts of my body however it did make me mad that this was their system for dealing with sensitive health data
Works for (almost) all devices.