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.

LOINCActiveBoth

LOINC Code 15206-6: Rheumatoid factor Nephelometry Qn (Syn fld)

Name: LOINC Code 15206-6: Rheumatoid factor Nephelometry Qn (Syn fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

15206-6 is a LOINC code used to identify Rheumatoid factor Nephelometry Qn (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 Rheumatoid factor. 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 Rheumatoid factor. 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: Both
Method: Nephelometry

What it does not mean

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

Key facts

Rheumatoid factor [Units/volume] in Synovial fluid by Nephelometry
Rheumatoid factor
Arbitrary concentration; Fac; Fact; Joint aspirate; Joint fld; Joint flu; Joint fluid; Light scattering; Nephelom; Point in time; QNT; Quan; Quant; Quantitative; Random; RF; Serology; SF; SNV; Syn; Syn fl; Synov; Synovial fluid

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 Rheumatoid factor Nephelometry Qn (Syn fld) (15206-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Rheumatoid factor Nephelometry Qn (Syn fld)Rheumatoid factor [Units/volume] in Synovial fluid by NephelometryRheumatoid fact Snv Neph-aCncRheumatoid factorSERORheumatoid factor, Synovial fluidACnc

Frequently asked questions

Code details

Code15206-6

SystemLOINC

Display nameRheumatoid factor Nephelometry Qn (Syn fld)

DescriptionRheumatoid factor

Short nameRheumatoid fact Snv Neph-aCnc

ComponentRheumatoid factor

PropertyACnc

TimingPt

System (specimen)Synv fld

ScaleQn

MethodNephelometry

ClassSERO

Example unitsIU/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0k

Last changed2.73

Consumer names

Rheumatoid factor, Synovial fluid

Part names

Rheumatoid factorACncPtSynv fldQnNephelometryArbitrary ConcentrationPoint in time (spot)Synovial fluid

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.