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 15112-6: Leukocyte phosphatase Qn (WBC)

Name: LOINC Code 15112-6: Leukocyte phosphatase Qn (WBC)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

15112-6 is a LOINC code used to identify Leukocyte phosphatase Qn (WBC) 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 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 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: ACTIVE
Order vs observation: Both

What it does not mean

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

Key facts

Leukocyte phosphatase [Units/volume] in Leukocytes
Phosphatase.leukocyte
Arbitrary concentration; HEMATOLOGY/CELL COUNTS; LAP; Leuc; Leuk; Leukocyte alkaline phosphatase; Leukocytes; Lkcs; NAT; Neutrophil alkaline phosphatase; Phos; Phosphtase; Point in time; QNT; Quan; Quant; Quantitative; Random; UniversalLabOrders; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Leukocyte phosphatase Qn (WBC) (15112-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Leukocyte phosphatase Qn (WBC)Leukocyte phosphatase [Units/volume] in LeukocytesLAP WBC-aCncPhosphatase.leukocyteHEM/BCLeukocyte phosphatase, White blood cellsACnc

Frequently asked questions

Code details

Code15112-6

SystemLOINC

Display nameLeukocyte phosphatase Qn (WBC)

DescriptionPhosphatase.leukocyte

Short nameLAP WBC-aCnc

ComponentPhosphatase.leukocyte

PropertyACnc

TimingPt

System (specimen)WBC

ScaleQn

ClassHEM/BC

Example unitsscore

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0k

Last changed2.73

Consumer names

Leukocyte phosphatase, White blood cells

Part names

Phosphatase.leukocyteACncPtWBCQnLeukocyte phosphataseArbitrary ConcentrationPoint in time (spot)White 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.