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 1624-6: Retinol 3 Hr post 5000 units [Mass/Vol]

Name: LOINC Code 1624-6: Retinol 3 Hr post 5000 units [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.375Z

1624-6 is a LOINC code used to identify Retinol 3 Hr post 5000 units [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 Retinol^3H post 5000 units. 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 Retinol^3H post 5000 units. 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

Retinol [Mass/volume] in Serum or Plasma --3 hours post 5000 units
Retinol^3H post 5000 units
3h p 5000 U; After; Axerol; Axerophthol; Biosterol; CHEMISTRY.CHALLENGE TESTING; Level; Mass concentration; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Vit A; Vit A alcohol; Vit A1; Vit A1 alcohol; Vitamin A; Vitamin A alcohol; Vitamin A1

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

Retinol 3 Hr post 5000 units [Mass/Vol]Retinol [Mass/volume] in Serum or Plasma --3 hours post 5000 unitsVit A 3h p 5000 U SerPl-mCncRetinol^3H post 5000 unitsCHALRetinol 3 hr after 5000 Units, BloodMCnc

Frequently asked questions

Code details

Code1624-6

SystemLOINC

Display nameRetinol 3 Hr post 5000 units [Mass/Vol]

DescriptionRetinol^3H post 5000 units

Short nameVit A 3h p 5000 U SerPl-mCnc

ComponentRetinol^3H post 5000 units

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsng/L;pg/mL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.40

Consumer names

Retinol 3 hr after 5000 Units, Blood

Part names

Retinol^3H post 5000 unitsMCncPtSer/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.