LOINC Term Basics
LOINC's goal is to create different codes for each test, measurement, or observation that has a clinically different meaning. To do that LOINC codes distinguish a given observation (test ordered/reported, survey question, clinical document) across six dimensions that we call Parts.
The characteristic or attribute of the analyte.
Leukocytes (white blood cells)
NCnc (Number concentration)
Pt (Point in time)
LOINC creates several different text labels (names) to represent each concept. We call the six-part formal name, as described above, the Fully-Specified Name (FSN). We also create a more clinician-friendly display called the Long Common Name (LCN) and a Short Name that can be handy when you need a column header in a report. Here are the names for LOINC code 806-0:
Fully-Specified Name (FSN)
Leukocytes: NCnc: Pt: CSF: Qn: Manual count
Long Common Name (LCN)
Leukocytes [#/volume] in Cerebral spinal fluid by Manual count
WBC # CSF Manual