Thanks, Pat. Your info was definitely helpful. If it helps further discussion, here is a how the CPT code has been used to assign a LOINC. Below is an exam description in the Partners CDR database.
TIBIA FIBULA RT 73590
The CPT code above refers to 2 views and the reports filed in our database show that 2 views were taken, so the analyst mapped the term to 37815-8 which is Tibia – right & Fibula – right X-ray 2 views.
I think this is a valid mapping even though the description doesn’t explicitly say 2 views.