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 44931-4: Prolactin pre dose TRH IV Qn

Name: LOINC Code 44931-4: Prolactin pre dose TRH IV Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.175Z

44931-4 is a LOINC code used to identify Prolactin pre dose TRH IV 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 Prolactin^pre dose TRH IV. 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 Prolactin^pre dose TRH IV. 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

What it does not mean

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

Key facts

Prolactin [Units/volume] in Serum or Plasma --pre dose TRH IV
Prolactin^pre dose TRH IV
Arbitrary concentration; Before; CHEMISTRY.CHALLENGE TESTING; Lactotropic hormone; Lactotropin; Mammatropic hormone; Mammotropin; Pl; Plasma; Plsm; Point in time; pre TRH; pre TRH IV; PRL; Prol; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; 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

Prolactin pre dose TRH IV QnProlactin [Units/volume] in Serum or Plasma --pre dose TRH IVProlactin pre TRH IV SerPl-aCncProlactin^pre dose TRH IVCHALProlactin before dose TRH intravenous, BloodACnc

Frequently asked questions

Code details

Code44931-4

SystemLOINC

Display nameProlactin pre dose TRH IV Qn

DescriptionProlactin^pre dose TRH IV

Short nameProlactin pre TRH IV SerPl-aCnc

ComponentProlactin^pre dose TRH IV

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmIU/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.70

Consumer names

Prolactin before dose TRH intravenous, Blood

Part names

Prolactin^pre dose TRH IVACncPtSer/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.