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 9443-3: IgM lymphocytes/Lymphocytes (WBC)

Name: LOINC Code 9443-3: IgM lymphocytes/Lymphocytes (WBC)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:24.121Z

9443-3 is a LOINC code used to identify IgM lymphocytes/Lymphocytes (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 Lymphocytes.IgM/Lymphocytes. 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 Lymphocytes.IgM/Lymphocytes. 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: Observation

What it does not mean

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

Key facts

IgM lymphocytes/Lymphocytes in Leukocytes
Lymphocytes.IgM/Lymphocytes
reported as % of lymphocytes with IGA surface AG
CELL MARKERS; Immune globulin M; Immunoglobulin M; Leukocytes; Lymp; Lymph; Lympho; Lymphocyte; Lymphs; Lymphs IgM; Lymphs%; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Surface.IgM; WBCs; 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

IgM lymphocytes/Lymphocytes (WBC)IgM lymphocytes/Lymphocytes in LeukocytesLymphs IgM/lymph NFr WBCLymphocytes.IgM/LymphocytesCELLMARKIgM lymphocytes/Lymphocytes, White blood cellsNFr

Frequently asked questions

Code details

Code9443-3

SystemLOINC

Display nameIgM lymphocytes/Lymphocytes (WBC)

DescriptionLymphocytes.IgM/Lymphocytes

Short nameLymphs IgM/lymph NFr WBC

ComponentLymphocytes.IgM/Lymphocytes

PropertyNFr

TimingPt

System (specimen)WBC

ScaleQn

ClassCELLMARK

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0i

Last changed2.79

Consumer names

IgM lymphocytes/Lymphocytes, White blood cells

Part names

Lymphocytes.IgM/LymphocytesNFrPtWBCQnNumber FractionPoint 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.