Scope of LOINC
The laboratory portion of LOINC covers anything that you can test, measure, or observe about a specimen. It contains the usual categories of chemistry, hematology, serology, microbiology (including parasitology and virology), toxicology; as well as categories for cell counts, antibiotic susceptibilities, and more.
We think of "clinical" as pretty much everything except lab. The clinical portion of LOINC covers anything that you can test, measure, or observe about a patient without removing that specimen from them. LOINC has codes for observations like vital signs, hemodynamics, intake/output, EKG, obstetric ultrasound, cardiac echo, urologic imaging, gastroendoscopic procedures, pulmonary ventilator management, radiology studies, clinical documents, selected survey instruments (e.g. Glasgow Coma Score, PHQ-9 depression scale, CMS-required patient assessment instruments), and other clinical observations.
Discrete Measures and Observations
LOINC creates codes for laboratory tests and clinical observations that represent a discrete measurement such as:
- Single lab tests (e.g. glucose [mg/dL] in urine)
- Questions on a survey or form (e.g. "are you able to jump up and down?")
- Measurements on a patient (e.g. body height)
- Distinct elements on a report. (e.g. physical observations about gait)
We also create codes for a collection of measurements like the following:
- Panel of laboratory tests (e.g. complete blood count [CBC] with auto differential panel)
- Set of questions on a survey or form (e.g. PROMIS pediatric item bank for asthma)
- Group of clinical measurements on a patient (e.g. body temperature panel)
- A document or report (e.g. discharge summary)
Requesting New LOINC Content
Since its inception, Regenstrief has developed LOINC as an open standard. We welcome requests for new LOINC terms. It is because of submissions from the LOINC community that we've been able to grow and adapt so quickly. We are also always happy to receive specific suggestions about revisions or enhancements to existing content like synonyms and term descriptions as well.
When you'd like to request a term for something you think is missing, read more about how to make a submission request.