...
Lab developed tests (some of them may be coverable)
manual assessment of specimen (urin color / clarity, specimen characteristics (gradeing hemolysis, lipemia), grossing)
calculations (if it is not performed by the instrument)
not EVERY result needs a Unique identifier
https://loinc.org/65634-8/ or https://loinc.org/34535-5/
in both of these the map to LOINCs would not neccessarily end up with a testkit/instrument device identifier, since it is the calculation …
Hematology example:
using several reagents, but not all are used for all of these - these would have to be identifed by the vendor which goes with what element
how would the MCV, MCH calculated by the instrument be identified