LOINCActiveBoth

LOINC Code 21765-3: SCA1 gene CAG repeats Molgen Ql (Bld/Tiss)

21765-3 is a LOINC code used to identify SCA1 gene CAG repeats Molgen Ql (Bld/Tiss) 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 SCA1 gene.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 SCA1 gene.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

  • SCA1 gene CAG repeats [Presence] in Blood or Tissue by Molecular genetics method
  • SCA1 gene.CAG repeats
  • Ataxia-1; Ataxin 1; ATX1; ATXN1; Blood; caspase 3, apoptosis-related cysteine peptidase; CPP32; CPP32B; D6S504E; Genetics; Heredity; Heritable; Inherited; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.NUCREPEAT; Olivopontocerebellar ataxia 1; Ordinal; PCR; Point in time; PR; QL; Qual; Qualitative; Random; Repeat; SCA; SCA-1; SCA1 gene CAG Rpt; Screen; 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

SCA1 gene CAG repeats Molgen Ql (Bld/Tiss)SCA1 gene CAG repeats [Presence] in Blood or Tissue by Molecular genetics methodSCA1 gene CAG Rpt Bld/T QlSCA1 gene.CAG repeatsMOLPATH.NUCREPEATSCA1 gene CAG Repeats, Blood or tissue specimenPrThr

Frequently asked questions

Code details

Code21765-3
SystemLOINC
Display nameSCA1 gene CAG repeats Molgen Ql (Bld/Tiss)
DescriptionSCA1 gene.CAG repeats
Short nameSCA1 gene CAG Rpt Bld/T Ql
ComponentSCA1 gene.CAG repeats
PropertyPrThr
TimingPt
System (specimen)Bld/Tiss
ScaleOrd
MethodMolgen
ClassMOLPATH.NUCREPEAT
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.73

Consumer names

SCA1 gene CAG Repeats, Blood or tissue specimen

Part names

SCA1 gene.CAG repeatsPrThrPtBld/TissOrdMolgenSCA1 gene CAG repeatsPresence or ThresholdPoint 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.

LOINC Code 21765-3 | HealthAssure