Category User guide Organisation Logical Observation Identifiers Names and Codes (LOINC) Type Standard Version 2023 Access Open Status Active Updated Aug-23 This document is the third section of the Users' Guide for LOINC. LOINC is an international standard for identifying health measurements, observations and documents such as laboratory and clinical test results. Section 3 discusses LOINC codes that do not follow the usual format for LOINC codes.Main sections:- Findings viewed as variables or as values- Blood bank- Immunocompetence studies (flow cytometry)- Microbiology- Antimicrobial susceptibilities- Cell counts- Skin tests- Toxicology - drug of abuse screening and confirmation- Molecular genetics LOINC naming- HLA allele and antigen nomenclature- Allergy testing- Urinalysis by test strips Access LOINC Users' Guide: 3 - Special cases v2023 By accessing this content, you are leaving this website. The Agency takes no responsibility for the accuracy of content on the destination page.