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 100832-5: Alpha subunit free 3rd specimen post Unsp challenge Qn

Name: LOINC Code 100832-5: Alpha subunit free 3rd specimen post Unsp challenge Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:16.533Z

100832-5 is a LOINC code used to identify Alpha subunit free 3rd specimen post Unsp challenge 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 Alpha subunit.free^3rd specimen post XXX challenge. 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 Alpha subunit.free^3rd specimen post XXX challenge. 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

Alpha subunit free [Units/volume] in Serum or Plasma --3rd specimen post XXX challenge
Alpha subunit.free^3rd specimen post XXX challenge
After; Alfa; Alpha subunit free; Arbitrary Concentration; CHEMISTRY.CHALLENGE TESTING; FR; Non-protein bound; p chal; Pituitary glycoproteins; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; sp3; sp3 p chal; Spec; 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

Alpha subunit free 3rd specimen post Unsp challenge QnAlpha subunit free [Units/volume] in Serum or Plasma --3rd specimen post XXX challengeAlpha subunit free sp3 p chal SerPl-aCncAlpha subunit.free^3rd specimen post XXX challengeCHALFree alpha subunit 3rd specimen after challenge, BloodACnc

Frequently asked questions

Code details

Code100832-5

SystemLOINC

Display nameAlpha subunit free 3rd specimen post Unsp challenge Qn

DescriptionAlpha subunit.free^3rd specimen post XXX challenge

Short nameAlpha subunit free sp3 p chal SerPl-aCnc

ComponentAlpha subunit.free^3rd specimen post XXX challenge

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsUI/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.73

Last changed2.73

Consumer names

Free alpha subunit 3rd specimen after challenge, Blood

Part names

Alpha subunit.free^3rd specimen post XXX challengeACncPtSer/PlasQnArbitrary 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.