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 32351-9: ALP heat labile Heat stability [Catalytic activity/Vol]

Name: LOINC Code 32351-9: ALP heat labile Heat stability [Catalytic activity/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:18.900Z

32351-9 is a LOINC code used to identify ALP heat labile Heat stability [Catalytic activity/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 Alkaline phosphatase.heat labile. 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 labile. 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: Both
Method: Heat stability

What it does not mean

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

Key facts

Alkaline phosphatase.heat labile [Enzymatic activity/volume] in Serum or Plasma by Heat stability
Alkaline phosphatase.heat labile
Alk; Alk phos; Alkaline phos; Alkaline phosphatase.total; ALKP; ALP; ALP heat labile; AP; Catalytic Concentration; Chemistry; Hepatology; HS; Liver; Phos; Phosphtase; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; 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 labile Heat stability [Catalytic activity/Vol]Alkaline phosphatase.heat labile [Enzymatic activity/volume] in Serum or Plasma by Heat stabilityALP heat labile SerPl HS-cCncAlkaline phosphatase.heat labileCHEMHeat labile alkaline phosphatase, BloodCCnc

Frequently asked questions

Code details

Code32351-9

SystemLOINC

Display nameALP heat labile Heat stability [Catalytic activity/Vol]

DescriptionAlkaline phosphatase.heat labile

Short nameALP heat labile SerPl HS-cCnc

ComponentAlkaline phosphatase.heat labile

PropertyCCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodHeat stability

ClassCHEM

Example unitsarb U/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.73

Consumer names

Heat labile alkaline phosphatase, Blood

Part names

Alkaline phosphatase.heat labileCCncPtSer/PlasQnHeat stabilityCatalytic 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.