Yes you do. But the situation is all topsy turvy.
If you want to sign out cases remotely through the use of digital pathology, that is allowed. The government has absolutely zero issue with pathologists signing out cases on monitors of questionable quality. If you have a 1990s CRT monitor that your kid rubbed a magnet all over and have more than 10% dead pixels but want to use it to sign out cases remotely, that's A O.K. according to the government - no oversight needed there 👍
However, the government feels that if you have a clinical grade microscope at home, you are trying to have a lab with components that would be associated with a lab and therefore need a CLIA license. Never mind that a good chunk of CLIA certified labs equip their pathologists with microscopes from the Byzantine era which are of suspect optical quality, as long as some biomed engineer comes by and slaps a sticker on it its all kosher.
The good news, if there is any, is that getting a CLIA license is a low bar to clear. You will of course have to put the CLIA number and address on your reports as the site of service, so if you don't want people knowing where you live, I wouldn't work from home.