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 98988-9: Prolactin 45 Min post dose TRH IV [Moles/Vol]

Name: LOINC Code 98988-9: Prolactin 45 Min post dose TRH IV [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.064Z

98988-9 is a LOINC code used to identify Prolactin 45 Min post dose TRH IV [Moles/Vol] 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^45M post 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^45M post 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 [Moles/volume] in Serum or Plasma --45 minutes post dose TRH IV
Prolactin^45M post dose TRH IV
45M p TRH IV; After; CHEMISTRY.CHALLENGE TESTING; Lactotropic hormone; Lactotropin; Level; Mammatropic hormone; Mammotropin; p dose; p TRH; Pl; Plasma; Plsm; Point in time; PRL; Prol; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration

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 45 Min post dose TRH IV [Moles/Vol]Prolactin [Moles/volume] in Serum or Plasma --45 minutes post dose TRH IVProlactin 45M p TRH IV SerPl-sCncProlactin^45M post dose TRH IVCHALProlactin 45 min after TRH intravenous, BloodSCnc

Frequently asked questions

Code details

Code98988-9

SystemLOINC

Display nameProlactin 45 Min post dose TRH IV [Moles/Vol]

DescriptionProlactin^45M post dose TRH IV

Short nameProlactin 45M p TRH IV SerPl-sCnc

ComponentProlactin^45M post dose TRH IV

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmmol/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Prolactin 45 min after TRH intravenous, Blood

Part names

Prolactin^45M post dose TRH IVSCncPtSer/PlasQnSubstance 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.