FAQ

Knowledge Base

• Home
• License
• LOINC Ontology Content Adjustments
• LOINC Release Notes
• Release Notes Archive
  • LOINC Release Notes, February 2025 (Version 2.80 Hotfix)
  • LOINC Release Notes, February 2025 (Version 2.79)
  • LOINC Release Notes, August 2024 (Version 2.78)
  • LOINC Release Notes, February 2024 (Version 2.77)
  • LOINC Release Notes, September 2023 (Version 2.76)
  • LOINC Release Notes, August 2023 (Version 2.75)
  • LOINC Release Notes, February 2023 (Version 2.74)
  • LOINC Release Notes, August 2022 (Version 2.73)
  • LOINC Release Notes, February 2022 (Version 2.72)
  • LOINC Release Notes, August 2021 (Version 2.71)
  • LOINC Release Notes, June 2021 (Version 2.70)
  • LOINC Release Notes, December 2020 (Version 2.69)
  • LOINC Release Notes, June 2020 (Version 2.68) & earlier
• Versioning
• Enriched Linkages between LOINC terms and LOINC Parts
• Abbreviations and acronyms used in LOINC

Users’ Guide

• 1 – Introduction
• 2 – Major Parts of a LOINC term
• 3 – Special cases
• 4 – Clinical observations and measures
• 5 – Claims attachments
• 6 – Document Ontology
• 7 – Panels (Batteries)
• 8 – Evolving principles for naming collections
• 9 – Additional content in the LOINC distribution
• 10 – Standardized assessment measures
• 11 – Editorial policies and procedures
• 12 – Recommendations for best practices in using and mapping to LOINC
• 13 – New orderable grouper concepts
• A – LOINC Database Structure
• B – Classes
• C – Calculating Mod 10 Check Digits
• D – Procedure for Submitting Additions or Changes to LOINC
• E – Examples for LOINC Property Matching
• G – LOINC Technical Briefs
  • D-Dimer Revisions in LOINC
  • Choosing the Correct LOINC for Estimated Glomerular Filtration Rate
  • Inducible Clindamycin Resistance in Staphylococcus and Streptococcus
  • KIR Gene Family
  • Oxygen Saturation and LOINC
  • Nomenclature of Salmonella Species, Subspecies, and Serovars
  • Segmented Neutrophils Versus Polymorphonuclear WBC
  • Vitamin D
  • Free Thyroxine Index Variants
  • Streptococcus pneumoniae serotype nomenclature
  • Non-linear Numerical Values “Binned” to Ordinal or Range
• H – LOINC Committee
• LOINC/RSNA Radiology Playbook User Guide

LOINC APIs

• API authentication
• Search API
• Download API
• LOINC Terminology Service using HL7® FHIR®

Search Syntax

• Overview
• Basic Search Syntax
• Advanced Search Syntax
• Part Search
• Answer List Search

FAQ

• Basics
• Structure
• Content
• Technical Issues
• Mapping
• LOINC and Other Standards
• LOINC.org website
• SearchLOINC
• RELMA
• Importing LOINC into a Database

RELMA

• Overview
  • Program Overview
  • Preferred Linguistic Variant
  • About Box
  • Welcome Screen
• User Preferences
• Searching in RELMA
• Keyword Spell Check
• Term File Operations
• Import Local Terms
• Mapping Local Terms to LOINC
  • Search Constraints Screen
  • Conducting a Search
  • Auto Mapper Search
  • Viewing LOINC Details
  • Mapping Your Local Term to a LOINC Term
• HIPAA Claims Attachments
• Lab Auto Mapper
• Community Mapping Repository
• Requesting a new LOINC