If you are in Billing Manager and are unable to select "Patient Home" from the Facility drop down it may be because you don't have a default facility selected for your provider. 

Here are the steps to correct this problem-

Go to Setup

Click Providers

Click Edit Provider Info

Make Sure the Provider is Linked to at least one location

Choose one of the locations that the provider is linked to to make it the default. 

You will need to close and relaunch Billing Manager to see the changes.