We welcome input and comments from all LOINC users. If you find a test in LOINC that you believe is wrong or misrepresented, please send us an email (loinc@regenstrief.org) calling attention to the term (code and name), the suggested action, and your rationale. Some reasons to make a change suggestion might include: a term that deviates from the standard nomenclature, a typographical error, having a system of serum when it is only valid when performed on plasma, or duplicate terms.