Start with your employer’s phone policy and use approved systems for patient...

https://tango-wiki.win/index.php/How_Do_I_Stop_Downloads_from_Work_Apps_Saving_to_My_Personal_Storage%3F

Start with your employer’s phone policy and use approved systems for patient information. Hide lock-screen previews, set clear on-call alerts, and check the recipient account before sharing. Keep personal chats and work messages separate.