LOINCActiveObservation

LOINC Code 55433-7: Immature cells/Leukocytes (Bld)

55433-7 is a LOINC code used to identify Immature cells/Leukocytes (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 Immature cells/Leukocytes. 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 Immature cells/Leukocytes. 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

  • Immature cells/Leukocytes in Blood
  • Immature cells/Leukocytes
  • Blood; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; Imm; Immat; Leuc; Leuk; Leukocyte; Lkcs; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; WBC; WBCs; White blood cell; White blood cells; 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

Immature cells/Leukocytes (Bld)Immature cells/Leukocytes in BloodImmature cells NFr BldImmature cells/LeukocytesHEM/BCImmature cells/White Blood Cells, BloodNFr

Frequently asked questions

Code details

Code55433-7
SystemLOINC
Display nameImmature cells/Leukocytes (Bld)
DescriptionImmature cells/Leukocytes
Short nameImmature cells NFr Bld
ComponentImmature cells/Leukocytes
PropertyNFr
TimingPt
System (specimen)Bld
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.27
Last changed2.79

Consumer names

Immature cells/White Blood Cells, Blood

Part names

Immature cells/LeukocytesNFrPtBldQnNumber 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 55433-7 | HealthAssure