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 31521-8: Myelin associated glycoprotein Ab Ql (S)

Name: LOINC Code 31521-8: Myelin associated glycoprotein Ab Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

31521-8 is a LOINC code used to identify Myelin associated glycoprotein Ab Ql (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 Myelin associated glycoprotein Ab. It is commonly used with the system or sample type Ser.

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 Myelin associated glycoprotein Ab. 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

What it does not mean

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

Key facts

Myelin associated glycoprotein Ab [Presence] in Serum
Myelin associated glycoprotein Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Assoc; Autoantibodies; Autoantibody; gG; Glycoprot; Glycoproteins; GP; MAG; Neuro; Neurology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Serum; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Myelin associated glycoprotein Ab Ql (S) (31521-8)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Myelin associated glycoprotein Ab Ql (S)Myelin associated glycoprotein Ab [Presence] in SerumMAG Ab Ser QlMyelin associated glycoprotein AbSEROMyelin associated glycoprotein antibody, BloodPrThr

Frequently asked questions

Code details

Code31521-8

SystemLOINC

Display nameMyelin associated glycoprotein Ab Ql (S)

DescriptionMyelin associated glycoprotein Ab

Short nameMAG Ab Ser Ql

ComponentMyelin associated glycoprotein Ab

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.56

Consumer names

Myelin associated glycoprotein antibody, Blood

Part names

Myelin associated glycoprotein AbPrThrPtSerOrdPresence or ThresholdPoint in time (spot)Serum

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.