Many insurers will use telemedicine and telehealth interchangeably, but there is a bit of a difference between them.
Telemedicine is a subset of telehealth. Now when it comes to telehealth, it is a broad definition for all health services, which may use telecommunications technology to communicate with patients.
However, telemedicine is meant explicitly for clinical services.
It is perhaps easiest to explain the difference with an example:
Telehealth may involve overall general health services like perhaps public health. Telehealth may include services that send an alert to the public each time there is an outbreak of a disease or may run a video conferencing service that aims to provide medical services or education.
Telemedicine usually involves clinical work, which means providing medical services via a mobile app that allows physicians to treat patients regardless of where they might be. At times patients may send a photo to show the extent of a skin condition before the physician prescribes a treatment regime.