> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl/terminology-standards/loinc.md).

# LOINC

As with every other resource in Snow Owl, a LOINC Code System needs to be created using the CodeSystems API first:

```
POST /codesystems
{
  "id": "LOINC",
  "url": "http://hl7.org/fhir/sid/loinc",
  "title": "LOINC",
  "language": "en",
  "description": "LOINC is a freely available international standard for tests, measurements, and observations",
  "status": "active",
  "copyright": "This material contains content from LOINC (http://loinc.org). LOINC is copyright ©1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.",
  "owner": "ownerUserId",
  "contact": "https://loinc.org/",
  "oid": "2.16.840.1.113883.6.1",
  "toolingId": "loinc",
  "settings": {
      "publisher": "Regenstrief Institute, Inc.",
  }
}
```

Then, an official release file can be imported via the following request:

```
POST /loinc/LOINC/import -F "file=@Loinc_2.77.zip"
```

And last, create a new version to tag the content:

```
POST /versions
{
  "resource": "codesystems/LOINC",
  "version": "2.77",
  "description": "LOINC 2.77 2024-02-27 release",
  "effectiveTime": "2024-02-27"
}
```