Hello,
this is coincidence, that I have experience in all requirements You outlined, let me explain how.
1. I was software architect and supervisor for implementing with Ericsson national health system of Armenia called "Armmed",so EHR, HIPAA are not just abbreviations for me, but I know everything about that.
2. I delivered doctor's appoitnment system based on "Doctolib" well known in Germany, its sort of industry standard.
3. I created online consulting platform called "GoCards" for Munich based company, where people toped up their account and got audio, video consultation with doctors, nurses, veterinary doctors, lawyers, .etc . Communication was based on Twilio and Signal, with strong encryptions , passed certitifications and compliance.
4. All softwares had mobile apps as well.
5. I'm from doctor's family, 3 family members are doctors and running clinics, so I have lot of experience with daily processes that clinics have.
I have software development company in two contries, one of them is in EU, so I'm open for cooperation in a way You prefer and feel more secure.
Ready to negotiate budget for long term cooperation.
I guarantee, You'll get 10 out of 10 what You're looking for. I can prove every line written above.
Ready to start immediately.
Regards,
Aram