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.

LOINCActiveBoth

LOINC Code 47596-2: Calcium.ionized ISE (Bld) [Moles/Vol]

Name: LOINC Code 47596-2: Calcium.ionized ISE (Bld) [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

47596-2 is a LOINC code used to identify Calcium.ionized 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 Calcium.ionized. 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 Calcium.ionized. 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

Calcium.ionized [Moles/volume] in Blood by Ion-selective membrane electrode (ISE)
Calcium.ionized
Blood; Ca; Ca-I; Cal; Calcium active; Calcium free; Chemistry; Coagulation factor I; ICA; Ion; Ion selective membrane electode; Ion selective membrane electrode; Ion-selective electrode; Level; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Calcium.ionized ISE (Bld) [Moles/Vol] (47596-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Calcium.ionized ISE (Bld) [Moles/Vol]Calcium.ionized [Moles/volume] in Blood by Ion-selective membrane electrode (ISE)Ca-I Bld ISE-sCncCalcium.ionizedCHEMCalcium.ionized, BloodSCnc

Frequently asked questions

Code details

Code47596-2

SystemLOINC

Display nameCalcium.ionized ISE (Bld) [Moles/Vol]

DescriptionCalcium.ionized

Short nameCa-I Bld ISE-sCnc

ComponentCalcium.ionized

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 released2.21

Last changed2.73

Consumer names

Calcium.ionized, Blood

Part names

Calcium.ionizedSCncPtBldQnISESubstance 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.