Our team has found success in mapping all results of all panels/tests first. All orderables that are single result fields get the same LOINC for the order side. Returning to the panels/groups will allow you to choose the best LOINC term with the Required, Optional, Conditional, Reflex w/alternative of that panel. You’ll notice some panels only have suggested components, but none required. With none required, be sure the display and intent of the local panel fits the display and intent of the LOINC term.
The one strict rule we adhere to are the required fields of a panel. If there is not a good fit amongst the LOINC panels, you are encouraged to provide feedback to Regenstrief under the Content / Request New / Request Edit to Existing section.