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 40331-1: Prolactin 20 Min post dose triple bolus [Mass/Vol]

Name: LOINC Code 40331-1: Prolactin 20 Min post dose triple bolus [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40331-1 is a LOINC code used to identify Prolactin 20 Min post dose triple bolus [Mass/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^20M post dose triple bolus. 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^20M post dose triple bolus. 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 [Mass/volume] in Serum or Plasma --20 minutes post dose triple bolus
Prolactin^20M post dose triple bolus
20M p Triple Bolus; After; CHEMISTRY.CHALLENGE TESTING; Lactotropic hormone; Lactotropin; Level; Mammatropic hormone; Mammotropin; Mass concentration; p dose; Pl; Plasma; Plsm; Point in time; PRL; Prol; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Tri; Trip

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 20 Min post dose triple bolus [Mass/Vol]Prolactin [Mass/volume] in Serum or Plasma --20 minutes post dose triple bolusProlactin 20M p Triple Bolus SerPl-mCncProlactin^20M post dose triple bolusCHALProlactin 20 min after Triple Bolus, BloodMCnc

Frequently asked questions

Code details

Code40331-1

SystemLOINC

Display nameProlactin 20 Min post dose triple bolus [Mass/Vol]

DescriptionProlactin^20M post dose triple bolus

Short nameProlactin 20M p Triple Bolus SerPl-mCnc

ComponentProlactin^20M post dose triple bolus

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsng/mL;ug/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.70

Consumer names

Prolactin 20 min after Triple Bolus, Blood

Part names

Prolactin^20M post dose triple bolusMCncPtSer/PlasQnMass 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.