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 44007-3: CD55 and CD59 RBC (Bld) [Interp]

Name: LOINC Code 44007-3: CD55 and CD59 RBC (Bld) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:29.266Z

44007-3 is a LOINC code used to identify CD55 and CD59 RBC (Bld) [Interp] 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 Erythrocytes.CD55 & CD59. 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 Erythrocytes.CD55 & CD59. 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

CD55 and CD59 RBC [Interpretation] in Blood
Erythrocytes.CD55 & CD59
Blood; CD55 & CD59 RBC; CD55 RBC; CD55+CD59 RBC; CELL MARKERS; DAF; Decay accelerating factor; Discocytes; Erthrocyte; Erythrocyte; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; Point in time; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red 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

CD55 and CD59 RBC (Bld) [Interp]CD55 and CD59 RBC [Interpretation] in BloodCD55 & CD59 RBC Bld-ImpErythrocytes.CD55 & CD59CELLMARKCD55 and CD59 Red Blood Cells, BloodImp

Frequently asked questions

Code details

Code44007-3

SystemLOINC

Display nameCD55 and CD59 RBC (Bld) [Interp]

DescriptionErythrocytes.CD55 & CD59

Short nameCD55 & CD59 RBC Bld-Imp

ComponentErythrocytes.CD55 & CD59

PropertyImp

TimingPt

System (specimen)Bld

ScaleNom

ClassCELLMARK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.73

Consumer names

CD55 and CD59 Red Blood Cells, Blood

Part names

Erythrocytes.CD55 & CD59ImpPtBldNomCD55 and CD59 RBCImpression/interpretation of studyPoint 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.