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.

LOINC

LOINC Code 1616-2: Prolactin 30 Min post dose U/kg insulin IV (P) [Mass/Vol]

Name: LOINC Code 1616-2: Prolactin 30 Min post dose U/kg insulin IV (P) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.374Z

1616-2 is a LOINC code used to identify Prolactin 30 Min post dose U/kg insulin IV (P) [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^30M post dose U/kg insulin IV. It is commonly used with the system or sample type 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^30M post dose U/kg insulin IV. It is commonly used with the system or sample type 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: DEPRECATED

What it does not mean

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

Key facts

Deprecated Prolactin [Mass/volume] in Serum or Plasma --30 minutes post dose insulin IV
Prolactin^30M post dose U/kg insulin IV
30M p U/kg Ins IV; After; CHEMISTRY.CHALLENGE TESTING; HUM; Humulin; IH7; Insul; Lactotropic hormone; Lactotropin; Lente; Level; Mammatropic hormone; Mammotropin; Mass concentration; NPH; p dose; Pl; Plasma; Plsm; Point in time; PRL; Prol; PST; QNT; Quan; Quant; Quantitative; Random; Semilente; Sliding; Ultralente

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 30 Min post dose U/kg insulin IV (P) [Mass/Vol]Deprecated Prolactin [Mass/volume] in Serum or Plasma --30 minutes post dose insulin IVDeprecated Prolactin 30M p U/kg Ins IV PProlactin^30M post dose U/kg insulin IVCHALProlactin 30 min after U/kg Insulin intravenous, BloodMCnc

Frequently asked questions

Code details

Code1616-2

SystemLOINC

Display nameProlactin 30 Min post dose U/kg insulin IV (P) [Mass/Vol]

DescriptionProlactin^30M post dose U/kg insulin IV

Short nameDeprecated Prolactin 30M p U/kg Ins IV P

ComponentProlactin^30M post dose U/kg insulin IV

PropertyMCnc

TimingPt

System (specimen)Plas

ScaleQn

ClassCHAL

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.36

Consumer names

Prolactin 30 min after U/kg Insulin intravenous, Blood

Part names

Prolactin^30M post dose U/kg insulin IVMCncPtPlasQnMass ConcentrationPoint in time (spot)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.