# Logical Observation Identifier Names and Codes (LOINC)

> Logical Observation Identifier Names and Codes (LOINC) provides formal names and standardized...

- Page: https://library.schematica.io/model/1e62045c43be414aa6a924594de8a3fa
- Model type: Ontology
- License: CC0 1.0
- Access type: Free
- Access method: Download
- Model size: Huge
- Formats: UMLS
- Domains: Healthcare
- External link: https://bioportal.bioontology.org/ontologies/LOINC
- Contact: LOINC Support (loinc@regenstrief.org)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Use cases

### Clinical Laboratory Data Exchange (Healthcare)

Enable seamless exchange of laboratory results between hospitals, clinics, and reference laboratories using standardized LOINC codes for accurate interpretation and integration of lab data across healthcare systems.

### Laboratory Information System Integration (Healthcare)

Standardize laboratory test ordering, reporting, and data exchange across Laboratory Information Systems (LIS) using LOINC codes to ensure consistent identification of lab tests, results, and clinical observations.

### Electronic Health Record Lab Integration (Healthcare)

Integrate LOINC-coded laboratory data into Electronic Health Records to provide clinicians with standardized, interoperable lab results that support clinical decision-making and longitudinal patient care.

### Public Health Surveillance & Reporting (Healthcare)

Implement LOINC codes for standardized public health reporting, disease surveillance, and epidemiological monitoring to enable consistent data collection and analysis across public health agencies.

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | LOINC |
| Description | Logical Observation Identifier Names and Codes (LOINC) provides formal names and standardized codes for laboratory and other clinical observations. The data cover laboratory terminology, vital signs, hemodynamics intake/output, EKG, obstetric ultrasound, cardiac echo, urologic, imaging, gastroendoscopic procedures, pulmonary ventilator management, and selected survey instruments. |
| Format | UMLS |
| Categories | Health |
| Groups | Unified Medical Language System, Cancer Biomedical Informatics Grid |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 292,064 |
| Individuals | 0 |
| Properties | 138 |
| Max Depth | 16 |
| Max Child Count | 24,317 |
| Average Child Count | 4 |
| Classes With One Child | 38,590 |
| Classes With More Than 25 Children | 496 |
| Classes With No Definition | 291,480 |

## Projects using LOINC

- [PractiKPharma](https://bioportal.bioontology.org/projects/PractiKPharma)
- [Epidemiology Term Annotation](https://bioportal.bioontology.org/projects/ETA)
- [Nomenclature for Anatomic Pathology](https://bioportal.bioontology.org/projects/NAP)
- [Mapping of Norwegian national quality registries- Variabelbibliotek for medisinske kvalitetsregistre](https://bioportal.bioontology.org/projects/RegMap)
- [TerminologyLinkingService](https://bioportal.bioontology.org/projects/TLS)
- [Panacea](https://bioportal.bioontology.org/projects/Panacea)
- [Retrospective Analytics System](https://bioportal.bioontology.org/projects/RAS)
- [Evaluation of LOINC Document Ontology](https://bioportal.bioontology.org/projects/EOLDO)

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Source: https://library.schematica.io/model/1e62045c43be414aa6a924594de8a3fa