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 1619-6: Prolactin pre dose L-dopa PO [Mass/Vol]

Name: LOINC Code 1619-6: Prolactin pre dose L-dopa PO [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.374Z

1619-6 is a LOINC code used to identify Prolactin pre dose L-dopa PO [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^pre dose L-dopa PO. 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 L-dopa PO. 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 --pre dose L-dopa PO
Prolactin^pre dose L-dopa PO
Before; CHEMISTRY.CHALLENGE TESTING; Lactotropic hormone; Lactotropin; Left; Level; Levo; Mammatropic hormone; Mammotropin; Mass concentration; Pl; Plasma; Plsm; Point in time; pre L-D PO; 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 L-dopa PO [Mass/Vol]Prolactin [Mass/volume] in Serum or Plasma --pre dose L-dopa POProlactin pre L-D PO SerPl-mCncProlactin^pre dose L-dopa POCHALProlactin before dose L-dopa by mouth, BloodMCnc

Frequently asked questions

Code details

Code1619-6

SystemLOINC

Display nameProlactin pre dose L-dopa PO [Mass/Vol]

DescriptionProlactin^pre dose L-dopa PO

Short nameProlactin pre L-D PO SerPl-mCnc

ComponentProlactin^pre dose L-dopa PO

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 released1.0

Last changed2.40

Consumer names

Prolactin before dose L-dopa by mouth, Blood

Part names

Prolactin^pre dose L-dopa POMCncPtSer/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.