What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 5816-4: Urate crystals LM Ql (Syn fld)

Name: LOINC Code 5816-4: Urate crystals LM Ql (Syn fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

5816-4 is a LOINC code used to identify Urate crystals LM Ql (Syn fld) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Urate crystals. It is commonly used with the system or sample type Synv fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Urate crystals. It is commonly used with the system or sample type Synv fld.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation
Method: Microscopy.light

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Urate crystals [Presence] in Synovial fluid by Light microscopy
Urate crystals
Crys; Cryst; Crystal; HEMATOLOGY/CELL COUNTS; Joint aspirate; Joint fld; Joint flu; Joint fluid; LM; Micro; Micros; Microscopic; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SF; SNV; Syn; Syn fl; Synov; Synovial fluid; UA; Urates; Uric acid

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Urate crystals LM Ql (Syn fld) (5816-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Urate crystals LM Ql (Syn fld)Urate crystals [Presence] in Synovial fluid by Light microscopyUrate Cry Snv Ql MicroUrate crystalsHEM/BCUrate crystals, Synovial fluidPrThr

Frequently asked questions

Code details

Code5816-4

SystemLOINC

Display nameUrate crystals LM Ql (Syn fld)

DescriptionUrate crystals

Short nameUrate Cry Snv Ql Micro

ComponentUrate crystals

PropertyPrThr

TimingPt

System (specimen)Synv fld

ScaleOrd

MethodMicroscopy.light

ClassHEM/BC

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Urate crystals, Synovial fluid

Part names

Urate crystalsPrThrPtSynv fldOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)Synovial fluidLight microscopy

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.