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 49648-9: MJD gene allele 2 CAG repeats Molgen (Bld/Tiss) [Entitic number]

Name: LOINC Code 49648-9: MJD gene allele 2 CAG repeats Molgen (Bld/Tiss) [Entitic number]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:33.942Z

49648-9 is a LOINC code used to identify MJD gene allele 2 CAG repeats Molgen (Bld/Tiss) [Entitic number] 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 MJD gene allele 2.CAG repeats. It is commonly used with the system or sample type Bld/Tiss.

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 MJD gene allele 2.CAG repeats. It is commonly used with the system or sample type Bld/Tiss.

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: Molgen

What it does not mean

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

Key facts

MJD gene allele 2 CAG repeats [Entitic number] in Blood or Tissue by Molecular genetics method
MJD gene allele 2.CAG repeats
AT3; Ataxia-3; Ataxin 3; ATX3; Blood; Entitic; Entitic number; Genetics; Heredity; Heritable; II; Inherited; JOS; Machado-Joseph disease; MJD; MJD allele2 CAG Rpt; MJD1; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.NUCREPEAT; Olivopontocerebellar ataxia 3; PCR; Point in time; QNT; Quan; Quant; Quantitative; Random; Repeat; SCA3; SCA3 gene; Spinocerebellar ataxia; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

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

MJD gene allele 2 CAG repeats Molgen (Bld/Tiss) [Entitic number]MJD gene allele 2 CAG repeats [Entitic number] in Blood or Tissue by Molecular genetics methodMJD allele2 CAG Rpt EntNum Bld/TMJD gene allele 2.CAG repeatsMOLPATH.NUCREPEATMJD gene Allele 2 CAG Repeats, Blood or tissue specimenEntNum

Frequently asked questions

Code details

Code49648-9

SystemLOINC

Display nameMJD gene allele 2 CAG repeats Molgen (Bld/Tiss) [Entitic number]

DescriptionMJD gene allele 2.CAG repeats

Short nameMJD allele2 CAG Rpt EntNum Bld/T

ComponentMJD gene allele 2.CAG repeats

PropertyEntNum

TimingPt

System (specimen)Bld/Tiss

ScaleQn

MethodMolgen

ClassMOLPATH.NUCREPEAT

Example unitsCAG repeats

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.70

Consumer names

MJD gene Allele 2 CAG Repeats, Blood or tissue specimen

Part names

MJD gene allele 2.CAG repeatsEntNumPtBld/TissQnMolgenMJD gene allele 2 CAG repeatsEntitic numberPoint in time (spot)Blood or TissueMolecular genetics

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.