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LOINC Code 73573-8: Magnesium Ionized adjusted to pH 7.4 ISE (Bld) [Moles/Vol]

73573-8 is a LOINC code used to identify Magnesium Ionized adjusted to pH 7.4 ISE (Bld) [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 Magnesium.ionized^^adjusted to pH 7.4. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Magnesium.ionized^^adjusted to pH 7.4. It is commonly used with the system or sample type Bld.

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: Both
  • Method: ISE

What it does not mean

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

Key facts

  • Magnesium Ionized [Moles/volume] adjusted to pH 7.4 in Blood by Ion-selective membrane electrode (ISE)
  • Magnesium.ionized^^adjusted to pH 7.4
  • adj; adj pH7.4; Blood; Chemistry; IMg2+; Ion; Ion selective membrane electode; Ion selective membrane electrode; Ionized magnesium; Ion-selective electrode; Level; MAG; Magnes; Mg; Mg Ionized; Mg2+; Point in time; QNT; Quan; Quant; Quantitative; Random; Substance concentration; WB; Whole blood

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

Magnesium Ionized adjusted to pH 7.4 ISE (Bld) [Moles/Vol]Magnesium Ionized [Moles/volume] adjusted to pH 7.4 in Blood by Ion-selective membrane electrode (ISE)Mg Ionized adj pH7.4 Bld ISE-sCncMagnesium.ionized^^adjusted to pH 7.4CHEMMagnesium ionized Adjusted to pH 7.4, BloodSCnc

Frequently asked questions

Code details

Code73573-8
SystemLOINC
Display nameMagnesium Ionized adjusted to pH 7.4 ISE (Bld) [Moles/Vol]
DescriptionMagnesium.ionized^^adjusted to pH 7.4
Short nameMg Ionized adj pH7.4 Bld ISE-sCnc
ComponentMagnesium.ionized^^adjusted to pH 7.4
PropertySCnc
TimingPt
System (specimen)Bld
ScaleQn
MethodISE
ClassCHEM
Example unitsmmol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.44
Last changed2.44

Consumer names

Magnesium ionized Adjusted to pH 7.4, Blood

Part names

Magnesium.ionized^^adjusted to pH 7.4SCncPtBldQnISESubstance ConcentrationPoint in time (spot)BloodIon-selective membrane electrode (ISE)

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.