LOINCActiveObservation

LOINC Code 57568-8: 25-hydroxyvitamin D3 3 Hr post dose calcium [Moles/Vol]

57568-8 is a LOINC code used to identify 25-hydroxyvitamin D3 3 Hr post dose calcium [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 Calcidiol^3H post dose calcium. 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 Calcidiol^3H post dose calcium. 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

  • 25-hydroxyvitamin D3 [Moles/volume] in Serum or Plasma --3 hours post dose calcium
  • Calcidiol^3H post dose calcium
  • 25(OH)D3; 25-hydroxycholecalciferol; 25-hydroxyvitamin D 3; 25-hydroxyvitamin D3; 3h p Ca; After; Ca; Cal; Calciderol; Calcifediol; CHEMISTRY.CHALLENGE TESTING; Level; p dose; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; Vitamin D 25 hydroxy

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

25-hydroxyvitamin D3 3 Hr post dose calcium [Moles/Vol]25-hydroxyvitamin D3 [Moles/volume] in Serum or Plasma --3 hours post dose calcium25(OH)D3 3h p Ca SerPl-sCncCalcidiol^3H post dose calciumCHAL25-hydroxyvitamin D3 3 hr after Calcium, BloodSCnc

Frequently asked questions

Code details

Code57568-8
SystemLOINC
Display name25-hydroxyvitamin D3 3 Hr post dose calcium [Moles/Vol]
DescriptionCalcidiol^3H post dose calcium
Short name25(OH)D3 3h p Ca SerPl-sCnc
ComponentCalcidiol^3H post dose calcium
PropertySCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHAL
Example unitsnmol/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.70

Consumer names

25-hydroxyvitamin D3 3 hr after Calcium, Blood

Part names

Calcidiol^3H post dose calciumSCncPtSer/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.