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 97594-6: CD3 cells/Lymphocytes FC (Lower resp)

Name: LOINC Code 97594-6: CD3 cells/Lymphocytes FC (Lower resp)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:29.659Z

97594-6 is a LOINC code used to identify CD3 cells/Lymphocytes FC (Lower resp) 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 Cells.CD3/Lymphocytes. It is commonly used with the system or sample type Respiratory system specimen.lower.

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 Cells.CD3/Lymphocytes. It is commonly used with the system or sample type Respiratory system specimen.lower.

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: Flow cytometry

What it does not mean

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

Key facts

CD3 cells/Lymphocytes in Lower respiratory specimen by Flow cytometry (FC)
Cells.CD3/Lymphocytes
Breathing; CD3 Cells; Cell; CELL MARKERS; Cellularity; Dynamic; FC; Leu4; Leu-4; Low; Lower resp; Lung; Lungs; Lymp; Lymph; Lympho; Lymphocyte; Lymphs; Lymphs%; Number fraction; Percent; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; Spec; T3

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

CD3 cells/Lymphocytes FC (Lower resp)CD3 cells/Lymphocytes in Lower respiratory specimen by Flow cytometry (FC)CD3 Cells/lymph NFr Lower resp FCCells.CD3/LymphocytesCELLMARKCD3 cells/Lymphocytes, Lower respiratoryNFr

Frequently asked questions

Code details

Code97594-6

SystemLOINC

Display nameCD3 cells/Lymphocytes FC (Lower resp)

DescriptionCells.CD3/Lymphocytes

Short nameCD3 Cells/lymph NFr Lower resp FC

ComponentCells.CD3/Lymphocytes

PropertyNFr

TimingPt

System (specimen)Respiratory system specimen.lower

ScaleQn

MethodFlow cytometry

ClassCELLMARK

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.70

Last changed2.79

Consumer names

CD3 cells/Lymphocytes, Lower respiratory

Part names

Cells.CD3/LymphocytesNFrPtRespiratory system specimen.lowerQnFlow cytometryNumber FractionPoint in time (spot)Lower respiratory specimenFlow cytometry (FC)

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.