LOINCActiveObservation

LOINC Code 57403-8: CD45RA cells/Cells (Body fld)

57403-8 is a LOINC code used to identify CD45RA cells/Cells (Body fld) 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.CD45RA/Cells. It is commonly used with the system or sample type Body fld.

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.CD45RA/Cells. It is commonly used with the system or sample type Body fld.

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

  • CD45RA cells/cells in Body fluid
  • Cells.CD45RA/Cells
  • 2H4; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; CD45RA Cells; Cell; CELL MARKERS; Cellularity; Fl; Fld; FLU; Fluid; Leu18; Leu-18; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random

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

CD45RA cells/Cells (Body fld)CD45RA cells/cells in Body fluidCD45RA Cells NFr FldCells.CD45RA/CellsCELLMARKCD45RA cells/cells, Body fluidNFr

Frequently asked questions

Code details

Code57403-8
SystemLOINC
Display nameCD45RA cells/Cells (Body fld)
DescriptionCells.CD45RA/Cells
Short nameCD45RA Cells NFr Fld
ComponentCells.CD45RA/Cells
PropertyNFr
TimingPt
System (specimen)Body fld
ScaleQn
ClassCELLMARK
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.79

Consumer names

CD45RA cells/cells, Body fluid

Part names

Cells.CD45RA/CellsNFrPtBody fldQnNumber FractionPoint in time (spot)Body fluid

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.

LOINC Code 57403-8 | HealthAssure