LOINCActiveObservation

LOINC Code 51641-9: Mean sphered cell volume (RBC) [Entitic vol]

51641-9 is a LOINC code used to identify Mean sphered cell volume (RBC) [Entitic 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 Mean sphered cell volume. It is commonly used with the system or sample type RBC.

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 Mean sphered cell volume. It is commonly used with the system or sample type RBC.

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

  • Mean sphered cell volume [Entitic volume] in Red Blood Cells
  • Mean sphered cell volume
  • Average; Avg; Entitic volume; Erythrocytes; HEMATOLOGY/CELL COUNTS; MSCV; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles; Vol

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

Mean sphered cell volume (RBC) [Entitic vol]Mean sphered cell volume [Entitic volume] in Red Blood CellsMSCV RBCMean sphered cell volumeHEM/BCMean sphered cell volume, Red blood cellsEntVol

Frequently asked questions

Code details

Code51641-9
SystemLOINC
Display nameMean sphered cell volume (RBC) [Entitic vol]
DescriptionMean sphered cell volume
Short nameMSCV RBC
ComponentMean sphered cell volume
PropertyEntVol
TimingPt
System (specimen)RBC
ScaleQn
ClassHEM/BC
Example unitsfl
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.73

Consumer names

Mean sphered cell volume, Red blood cells

Part names

Mean sphered cell volumeEntVolPtRBCQnEntitic volumePoint in time (spot)Red Blood Cells

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 51641-9 | HealthAssure