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 51021-4: CD10 blasts Qn (Specimen)

Name: LOINC Code 51021-4: CD10 blasts Qn (Specimen)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.011Z

51021-4 is a LOINC code used to identify CD10 blasts Qn (Specimen) 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.CD10. It is commonly used with the system or sample type XXX.

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.CD10. It is commonly used with the system or sample type XXX.

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

CD10 blasts [Units/volume] in Specimen
Blasts.CD10
Arbitrary concentration; Blast; CALLA; CD10 Blasts; CELL MARKERS; Common acute lymphoblastic leukemia; Common acute lymphoblastic leukemia antigen; Enkephalinase; gp100; J5; Misc; Miscellaneous; NEP; Neprilysin; Neutral endopeptidase metalloendopeptidase; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; To be specified in another part of the message; Unspecified

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

CD10 blasts Qn (Specimen)CD10 blasts [Units/volume] in SpecimenCD10 Blasts Spec-aCncBlasts.CD10CELLMARKCD10 blasts, SpecimenACnc

Frequently asked questions

Code details

Code51021-4

SystemLOINC

Display nameCD10 blasts Qn (Specimen)

DescriptionBlasts.CD10

Short nameCD10 Blasts Spec-aCnc

ComponentBlasts.CD10

PropertyACnc

TimingPt

System (specimen)XXX

ScaleQn

ClassCELLMARK

Example unitsMean Fluorescent Intensity

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

CD10 blasts, Specimen

Part names

Blasts.CD10ACncPtXXXQnCD10 blastsArbitrary ConcentrationPoint in time (spot)

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.