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 51639-3: Acanthocytes/1000 RBC LM (Bld)

Name: LOINC Code 51639-3: Acanthocytes/1000 RBC LM (Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.012Z

51639-3 is a LOINC code used to identify Acanthocytes/1000 RBC LM (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 Acanthocytes/1000 erythrocytes. 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 Acanthocytes/1000 erythrocytes. 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
Method: Microscopy.light

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Acanthocytes/1000 erythrocytes in Blood by Light microscopy
Acanthocytes/1000 erythrocytes
1000 RBC; Acanthocyte; Blood; Discocytes; Erthrocyte; Erythrocyte; HEMATOLOGY/CELL COUNTS; LM; Micro; Micros; Microscopic; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; Spur cells; 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

Acanthocytes/1000 RBC LM (Bld)Acanthocytes/1000 erythrocytes in Blood by Light microscopyAcanthocytes/1000 RBC NFr Bld SmearAcanthocytes/1000 erythrocytesHEM/BCAcanthocytes per 1000 Red Blood Cells, BloodNFr

Frequently asked questions

Code details

Code51639-3

SystemLOINC

Display nameAcanthocytes/1000 RBC LM (Bld)

DescriptionAcanthocytes/1000 erythrocytes

Short nameAcanthocytes/1000 RBC NFr Bld Smear

ComponentAcanthocytes/1000 erythrocytes

PropertyNFr

TimingPt

System (specimen)Bld

ScaleQn

MethodMicroscopy.light

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.73

Consumer names

Acanthocytes per 1000 Red Blood Cells, Blood

Part names

Acanthocytes/1000 erythrocytesNFrPtBldQnMicroscopy.lightNumber FractionPoint in time (spot)BloodLight microscopy

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.