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 51770-6: WBC LM.HPF (Stl) [#/Area]

Name: LOINC Code 51770-6: WBC LM.HPF (Stl) [#/Area]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

51770-6 is a LOINC code used to identify WBC LM.HPF (Stl) [#/Area] 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 Leukocytes. It is commonly used with the system or sample type Stool.

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 Leukocytes. It is commonly used with the system or sample type Stool.

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: Microscopy.light.HPF

What it does not mean

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

Key facts

Leukocytes [#/area] in Stool by Microscopy high power field
Leukocytes
#/area; Bowel movement; Faecal; Faeces; Fecal; Feces; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; LM; Micro; Micros; Microscopic; Number areic; Point in time; QNT; Quan; Quant; Quantitative; Random; Stl; Stool = Fecal; 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 WBC LM.HPF (Stl) [#/Area] (51770-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

WBC LM.HPF (Stl) [#/Area]Leukocytes [#/area] in Stool by Microscopy high power fieldWBC #/area Stl HPFLeukocytesHEM/BCWhite blood cell (WBC) count, StoolNaric

Frequently asked questions

Code details

Code51770-6

SystemLOINC

Display nameWBC LM.HPF (Stl) [#/Area]

DescriptionLeukocytes

Short nameWBC #/area Stl HPF

ComponentLeukocytes

PropertyNaric

TimingPt

System (specimen)Stool

ScaleQn

MethodMicroscopy.light.HPF

ClassHEM/BC

Example units/HPF

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.73

Consumer names

White blood cell (WBC) count, Stool

Part names

LeukocytesNaricPtStoolQnMicroscopy.light.HPFNumber Areic (per area)Point in time (spot)Microscopy high power field

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.