With VoIP being enabled, you are now able to make phone calls from an iPad.
1. Open up the Doximity application on your iOS device and tap on the 'Dialer' tab
2. Tap on the 'Gear' icon located in the upper right-hand corner
3. Tap on the toggle button next to 'Use Internet to Place calls' and 'Enable Phone Calling'.
PLEASE NOTE: Any iPad running anything less than iOS version 13.0, will not see the option to 'Use Internet to Place calls'.