For adoption of LOINC, I would like to suggest that LOINC team follows up with LabCorp and their display of LOINC codes.
For platelets, there is option to see LOINC codes but it seems to not work.
CPT code is clearly there but not LOINC.
When option to include LOINC in print is checked, it only adds a copyright statement, but not the codes.
(hmm. this forum does not seem to support picture from PC)
https://www.labcorp.com/test-menu/33286/platelet-count#
https://www.labcorp.com/test-menu/23041/complete-blood-count-cbc-with-differential#
example report with no LOINC code
https://www.labcorp.com/sites/testmenu/files/005249.pdf