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 43710-3: ALP heat stable Heat stability Ql

Name: LOINC Code 43710-3: ALP heat stable Heat stability Ql
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:29.264Z

43710-3 is a LOINC code used to identify ALP heat stable Heat stability Ql 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 Alkaline phosphatase.heat stable. 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 Alkaline phosphatase.heat stable. 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
Method: Heat stability

What it does not mean

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

Key facts

Alkaline phosphatase.heat stable [Presence] in Serum or Plasma by Heat stability
Alkaline phosphatase.heat stable
Alk; Alk phos; Alkaline phos; Alkaline phosphatase.total; ALKP; ALP; ALP heat stable; AP; Chemistry; HS; Ordinal; Phos; Phosphtase; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

ALP heat stable Heat stability QlAlkaline phosphatase.heat stable [Presence] in Serum or Plasma by Heat stabilityALP heat stable SerPl Ql HSAlkaline phosphatase.heat stableCHEMHeat stable alkaline phosphatase, BloodPrThr

Frequently asked questions

Code details

Code43710-3

SystemLOINC

Display nameALP heat stable Heat stability Ql

DescriptionAlkaline phosphatase.heat stable

Short nameALP heat stable SerPl Ql HS

ComponentAlkaline phosphatase.heat stable

PropertyPrThr

TimingPt

System (specimen)Ser/Plas

ScaleOrd

MethodHeat stability

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.56

Consumer names

Heat stable alkaline phosphatase, Blood

Part names

Alkaline phosphatase.heat stablePrThrPtSer/PlasOrdHeat stabilityPresence or ThresholdPoint 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.