LOINCActiveObservation

LOINC Code 53768-8: 100 Erythrocytes actual/normal (Bld) [Relative ratio]

53768-8 is a LOINC code used to identify 100 Erythrocytes actual/normal (Bld) [Relative ratio] 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 actual/normal. 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 actual/normal. 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+CD59 RBC actual/normal in Blood
  • Erythrocytes.CD55+CD59 actual/normal
  • Act/Nor; Blood; CD55 & CD59 RBC; CD55 RBC; CD55+CD59 RBC; CELL MARKERS; Control; DAF; Decay accelerating factor; Discocytes; Erthrocyte; Erythrocyte; 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; Relative ratio; 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

100 Erythrocytes actual/normal (Bld) [Relative ratio]CD55+CD59 RBC actual/normal in BloodCD55+CD59 RBC Act/Nor BldErythrocytes.CD55+CD59 actual/normalCELLMARKCD55+CD59 adequate red blood cells actual/normal, BloodRelRto

Frequently asked questions

Code details

Code53768-8
SystemLOINC
Display name100 Erythrocytes actual/normal (Bld) [Relative ratio]
DescriptionErythrocytes.CD55+CD59 actual/normal
Short nameCD55+CD59 RBC Act/Nor Bld
ComponentErythrocytes.CD55+CD59 actual/normal
PropertyRelRto
TimingPt
System (specimen)Bld
ScaleQn
ClassCELLMARK
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.26
Last changed2.34

Consumer names

CD55+CD59 adequate red blood cells actual/normal, Blood

Part names

Erythrocytes.CD55+CD59 actual/normalRelRtoPtBldQnRelative RatioPoint 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 53768-8 | HealthAssure