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.

LOINCBoth

LOINC Code 57447-5: Nuclear Ab IF (Syn fld) [Titer]

Name: LOINC Code 57447-5: Nuclear Ab IF (Syn fld) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.756Z

57447-5 is a LOINC code used to identify Nuclear Ab IF (Syn fld) [Titer] 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 Nuclear Ab. It is commonly used with the system or sample type Synv fld.

Reviewed by HealthAssure Clinical TeamUpdated 21 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 Nuclear Ab. 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: DEPRECATED
Order vs observation: Both
Method: IF

What it does not mean

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

Key facts

Deprecated Nuclear Ab [Titer] in Synovial fluid by Immunofluorescence
Nuclear Ab
ABS; Aby; ACIF; ANA; ANF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Antinuclear antibody; Autoantibodies; Autoantibody; Dilution factor; Dilution Factor (Titer); FA; FANA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Joint aspirate; Joint fld; Joint flu; Joint fluid; NA; Nuc; Point in time; QNT; Quan; Quant; Quantitative; Random; Rheum; Rheumatology; Serology; SF; SNV; Syn; Syn fl; Synov; Synovial fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr

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.

Common synonyms

Nuclear Ab IF (Syn fld) [Titer]Deprecated Nuclear Ab [Titer] in Synovial fluid by ImmunofluorescenceDeprecated ANA Titr Snv IFNuclear AbSERONuclear antibody, Synovial fluidTitr

Frequently asked questions

Code details

Code57447-5

SystemLOINC

Display nameNuclear Ab IF (Syn fld) [Titer]

DescriptionNuclear Ab

Short nameDeprecated ANA Titr Snv IF

ComponentNuclear Ab

PropertyTitr

TimingPt

System (specimen)Synv fld

ScaleQn

MethodIF

ClassSERO

Example unitstiter

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.36

Consumer names

Nuclear antibody, Synovial fluid

Part names

Nuclear AbTitrPtSynv fldQnIFTiterPoint in time (spot)Synovial fluidImmunofluorescence (IF)

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.