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.

LOINCActiveObservation

LOINC Code 25947-3: Lutropin 5th specimen post Unsp challenge 1st IRP Qn

Name: LOINC Code 25947-3: Lutropin 5th specimen post Unsp challenge 1st IRP Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:13.650Z

25947-3 is a LOINC code used to identify Lutropin 5th specimen post Unsp challenge 1st IRP 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 Lutropin^5th 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 Lutropin^5th 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: Observation
Method: 1st IRP

What it does not mean

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

Key facts

Lutropin [Units/volume] in Serum or Plasma by 1st IRP --5th specimen post XXX challenge
Lutropin^5th specimen post XXX challenge
1st International Reference Preparation; After; Arbitrary concentration; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; First; ICSH; Interstitial cell-stimulating hormone; Interstitual cell stimulating hormone; IRP1; Leutinizing hormone; LH; Luteinizing hormone; Lutenin; Lutenizing hormone; Ovulation test; p chal; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; sp5; sp5 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

Lutropin 5th specimen post Unsp challenge 1st IRP QnLutropin [Units/volume] in Serum or Plasma by 1st IRP --5th specimen post XXX challengeLH sp5 p chal SerPl IRP1-aCncLutropin^5th specimen post XXX challengeCHALLutropin (LH; Luteinizing Hormone) 5th specimen after challenge, BloodACnc

Frequently asked questions

Code details

Code25947-3

SystemLOINC

Display nameLutropin 5th specimen post Unsp challenge 1st IRP Qn

DescriptionLutropin^5th specimen post XXX challenge

Short nameLH sp5 p chal SerPl IRP1-aCnc

ComponentLutropin^5th specimen post XXX challenge

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

Method1st IRP

ClassCHAL

Example unitsmIU/mL;IU/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.68

Consumer names

Lutropin (LH; Luteinizing Hormone) 5th specimen after challenge, Blood

Part names

Lutropin^5th specimen post XXX challengeACncPtSer/PlasQn1st IRPArbitrary 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.