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 33565-3: Smith extractable nuclear IgG IB Qn (S)

Name: LOINC Code 33565-3: Smith extractable nuclear IgG IB Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.069Z

33565-3 is a LOINC code used to identify Smith extractable nuclear IgG IB Qn (S) 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 Smith extractable nuclear Ab.IgG. It is commonly used with the system or sample type Ser.

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 Smith extractable nuclear Ab.IgG. It is commonly used with the system or sample type Ser.

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: IB

What it does not mean

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

Key facts

Smith extractable nuclear IgG Ab [Units/volume] in Serum by Immunoblot
Smith extractable nuclear Ab.IgG
ABS; Aby; ANA; ANA IgG; ANF; Antby; Anti; Antibodies; Antibody; Antinuclear antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Blt; ENA; ENA SM; IMMUNE BLOT; Immune globulin G; Immunobl; Immunoblot; Immunoglobulin G; NA; Nuc; Point in time; QNT; Quan; Quant; Quantitative; Random; RIBA; Serology; Serum; SM; SR; WB; WBLOT; West blot; West blt; Western blot

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

Smith extractable nuclear IgG IB Qn (S)Smith extractable nuclear IgG Ab [Units/volume] in Serum by ImmunoblotENA SM IgG Ser IB-aCncSmith extractable nuclear Ab.IgGSEROSmith extractable nuclear IgG antibody, BloodACnc

Frequently asked questions

Code details

Code33565-3

SystemLOINC

Display nameSmith extractable nuclear IgG IB Qn (S)

DescriptionSmith extractable nuclear Ab.IgG

Short nameENA SM IgG Ser IB-aCnc

ComponentSmith extractable nuclear Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIB

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.69

Consumer names

Smith extractable nuclear IgG antibody, Blood

Part names

Smith extractable nuclear Ab.IgGACncPtSerQnIBSmith extractable nuclear IgGArbitrary ConcentrationPoint in time (spot)SerumImmunoblot

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.