Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
It is possible to carry the Office installation files on a USB drive, and the clinic computer does not need Bluetooth.
Using another computer with internet access, sign in to the Microsoft account associated with the Office 2019 purchase and check Subscriptions or Products you’ve purchased. If Offline installer is offered, download the image file and copy it to the flash drive. On the clinic PC, open the image, open the Office folder, and run the appropriate setup file. Microsoft’s instructions are available here: Use the Office offline installer
Keep in mind that activation may require a brief internet connection, and a one-time-purchase Office license normally covers only one installation. Since Office 2019 has also reached end of support, using it on a clinic computer may create security concerns. If this is a volunteer organization or the license is a volume license, the organization’s IT or licensing contact should verify the correct installation and licensing method first.
I hope this helps, please feel free to give me an update if you need any further assistance