Follow your employer’s policy and use approved systems for patient information....

https://astro-wiki.win/index.php/Is_It_Safer_to_Use_a_Dedicated_Work_Phone_Instead_of_BYOD%3F

Follow your employer’s policy and use approved systems for patient information. Hide message previews on your lock screen, agree on-call notification rules, and check the account and recipient before sharing. Keep personal messages off work channels.