I'm not sure when this started, but I'm pretty sure it didn't used to be here. The MolDx Z code online registry, DEX (which shows all about a registered test, EXCEPT its actual secret Z code) has always allowed searching by test name and lab name.
(Test name can be a real wild west, and lab name can even be complicated in case of acquisitions and subsidiaries.)
Now Palmetto DEX allows searching by five different drop-down categories. At the left-hand side, these are diseases, FDA status, medical specialty (e.g. cardiology), method, and test type. (Test type is "diagnostic, confirmatory, predictive," etc). Find DEX here: https://app.dexzcodes.com/
There appears to be a built-in "and" logic, for example, here I've searched for the Test Type category "DIAGNOSTIC" while I happened to have let the test name "RaDaR" in the name search field. This excluded quite a few variants of the RaDaR test, but showing one that is classed as "diagnostic."
The DEX registry is available with free email registration.
This blog in French.