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.

LOINCOrder

LOINC Code 108340-1: Leukocyte phosphatase (WBC) [Measurement]

Name: LOINC Code 108340-1: Leukocyte phosphatase (WBC) [Measurement]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:20.675Z

108340-1 is a LOINC code used to identify Leukocyte phosphatase (WBC) [Measurement] 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 Phosphatase.leukocyte. It is commonly used with the system or sample type WBC.

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 Phosphatase.leukocyte. It is commonly used with the system or sample type WBC.

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: TRIAL
Order vs observation: Order

What it does not mean

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

Key facts

Leukocyte phosphatase [Measurement] in Leukocytes

Phosphatase.leukocyte

This term is intended to collate similar measurements for the LOINC SNOMED CT Collaboration in an ontological view. Additionally, it can be used to communicate a laboratory order, either alone or in combination with specimen or other information in the order. It may NOT be used to report back the measured patient value. [https//lo.inc/ce2mb6]

Lab orders; LAP; Leuc; Leuk; Leukocyte alkaline phosphatase; Leukocytes; Lkcs; Msmt; NAT; Neutrophil alkaline phosphatase; Phos; Phosphtase; WBC; WBCs; White blood cell; White blood cells

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

Leukocyte phosphatase (WBC) [Measurement]Leukocyte phosphatase [Measurement] in LeukocytesLAP Msmt WBCPhosphatase.leukocyteLABORDERS.ONTOLOGYLeukocyte phosphatase, White blood cells{Measurement}

Frequently asked questions

Code details

Code108340-1

SystemLOINC

Display nameLeukocyte phosphatase (WBC) [Measurement]

DescriptionPhosphatase.leukocyte

Short nameLAP Msmt WBC

ComponentPhosphatase.leukocyte

Property{Measurement}

Timing-

System (specimen)WBC

Scale-

ClassLABORDERS.ONTOLOGY

StatusTRIAL

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.81

Last changed2.81

Consumer names

Leukocyte phosphatase, White blood cells

Part names

Phosphatase.leukocyte{Measurement}-WBCLeukocyte phosphataseMeasurementWhite blood cells

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.