LOINCActiveObservation

LOINC Code 21011-2: CD13 cells (Bld) [#/Vol]

21011-2 is a LOINC code used to identify CD13 cells (Bld) [#/Vol] 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.CD13. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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.CD13. 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

  • CD13 cells [#/volume] in Blood
  • Cells.CD13
  • #; ABS; absolute; absolutes; Aminopeptidase n; APN; Blood; CD13 Cells; Cell; CELL MARKERS; Cellularity; Cnt; Count; Count/volume; CT; gp150; LeuM7; Leu-M7; My7; My-7; Number concentration; Number Concentration (count/vol); 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

CD13 cells (Bld) [#/Vol]CD13 cells [#/volume] in BloodCD13 Cells # BldCells.CD13CELLMARKCD13 cells, BloodNCnc

Frequently asked questions

Code details

Code21011-2
SystemLOINC
Display nameCD13 cells (Bld) [#/Vol]
DescriptionCells.CD13
Short nameCD13 Cells # Bld
ComponentCells.CD13
PropertyNCnc
TimingPt
System (specimen)Bld
ScaleQn
ClassCELLMARK
Example units/uL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.40

Consumer names

CD13 cells, Blood

Part names

Cells.CD13NCncPtBldQnCD13 cellsNumber ConcentrationPoint 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 21011-2 | HealthAssure