LOINCActiveObservation

LOINC Code 51131-1: CD23 blasts/Blasts (Bld)

51131-1 is a LOINC code used to identify CD23 blasts/Blasts (Bld) 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 Blasts.CD23/Blasts. It is commonly used with the system or sample type Bld.

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 Blasts.CD23/Blasts. It is commonly used with the system or sample type Bld.

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

  • CD23 blasts/Blasts in Blood
  • Blasts.CD23/Blasts
  • B6; B-6; Blast; BLAST-2; Blood; CD23 Blasts; CELL MARKERS; FceRII; Leu20; Leu-20; Low affinity IgE receptor; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; Whole blood

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

CD23 blasts/Blasts (Bld)CD23 blasts/Blasts in BloodCD23 Blasts/Blasts NFr BldBlasts.CD23/BlastsCELLMARKCD23 blasts/Blasts, BloodNFr

Frequently asked questions

Code details

Code51131-1
SystemLOINC
Display nameCD23 blasts/Blasts (Bld)
DescriptionBlasts.CD23/Blasts
Short nameCD23 Blasts/Blasts NFr Bld
ComponentBlasts.CD23/Blasts
PropertyNFr
TimingPt
System (specimen)Bld
ScaleQn
ClassCELLMARK
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.79

Consumer names

CD23 blasts/Blasts, Blood

Part names

Blasts.CD23/BlastsNFrPtBldQnNumber FractionPoint in time (spot)Blood

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 51131-1 | HealthAssure