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

https://super-wiki.win/index.php/What_Should_I_Do_If_I_Keep_Choosing_the_Wrong_Email_Account_When_Sharing_Files%3F

Start with your employer’s policy and use only approved systems for patient information. Turn off lock-screen previews, set clear on-call alerts, and check the recipient account before sharing. Keep personal apps and messages off work channels.