LOINCActiveBoth

LOINC Code 20508-8: Reagin Ab RPR Qn

20508-8 is a LOINC code used to identify Reagin Ab RPR 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 Reagin Ab. It is commonly used with the system or sample type Ser/Plas.

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 Reagin Ab. 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
  • Method: RPR

What it does not mean

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

Key facts

  • Reagin Ab [Units/volume] in Serum or Plasma by RPR
  • Reagin Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Charcoal flocculation; ID; Infectious Disease; InfectiousDisease; Microbiology; Neurosyphilis; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Rapid plasma reagin; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Syphilis; Treponema

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

Reagin Ab RPR QnReagin Ab [Units/volume] in Serum or Plasma by RPRRPR SerPl-aCncReagin AbMICROReagin antibody, BloodACnc

Frequently asked questions

Code details

Code20508-8
SystemLOINC
Display nameReagin Ab RPR Qn
DescriptionReagin Ab
Short nameRPR SerPl-aCnc
ComponentReagin Ab
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodRPR
ClassMICRO
Example unitsDils
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Reagin antibody, Blood

Part names

Reagin AbACncPtSer/PlasQnRPRArbitrary 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.

LOINC Code 20508-8 | HealthAssure