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 27871-3: Interferon beta IgG Qn

Name: LOINC Code 27871-3: Interferon beta IgG Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.572Z

27871-3 is a LOINC code used to identify Interferon beta IgG Qn 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 Interferon.beta Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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 Interferon.beta Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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

What it does not mean

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

Key facts

Interferon beta IgG Ab [Units/volume] in Serum or Plasma
Interferon.beta Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B; Betaferon; B-IFN 1A+1B; IFN; IFN-B; Immune globulin G; Immunoglobulin G; INF-B; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Interferon beta IgG QnInterferon beta IgG Ab [Units/volume] in Serum or PlasmaIFN-B IgG SerPl-aCncInterferon.beta Ab.IgGSEROInterferon beta IgG antibody, BloodACnc

Frequently asked questions

Code details

Code27871-3

SystemLOINC

Display nameInterferon beta IgG Qn

DescriptionInterferon.beta Ab.IgG

Short nameIFN-B IgG SerPl-aCnc

ComponentInterferon.beta Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.73

Consumer names

Interferon beta IgG antibody, Blood

Part names

Interferon.beta Ab.IgGACncPtSer/PlasQnInterferon beta IgGArbitrary ConcentrationPoint in time (spot)Serum or Plasma

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.