An artificial intelligence algorithm can screen for diabetic retinopathy, an innovation that puts ophthalmology alongside radiology, cardiology, and dermatology as specialties in which AI innovation is happening fast.

While Wegovy is approved by the FDA for weight loss, Ozempic is not (only diabetes), so a burgeoning industry has developed for other "compounded" drugs like semaglutide, dispensed by telemedicine operators and spas.

Companies and researchers eager to find medical applications for smartphone technology are tapping into modern phones' built-in cameras and light sensors; microphones; accelerometers; gyroscopes; and even speakers.