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 50794-7: Osmotic fragility beginning hemolysis (RBC)

Name: LOINC Code 50794-7: Osmotic fragility beginning hemolysis (RBC)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.497Z

50794-7 is a LOINC code used to identify Osmotic fragility beginning hemolysis (RBC) 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 Osmotic fragility.beginning hemolysis. 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 Osmotic fragility.beginning hemolysis. 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

Osmotic fragility beginning hemolysis of Red Blood Cells
Osmotic fragility.beginning hemolysis
Value of % sodium chloride at beginning of hemolysis
Erythrocytes; Frag; Fragil; Hem; HEMATOLOGY/CELL COUNTS; Number Fraction; OF; OF start; Osmo; Osmo Frag; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles

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

Osmotic fragility beginning hemolysis (RBC)Osmotic fragility beginning hemolysis of Red Blood CellsOF start NFr RBCOsmotic fragility.beginning hemolysisHEM/BCOsmotic fragility beginning hemolysis, Red blood cellsNFr

Frequently asked questions

Code details

Code50794-7

SystemLOINC

Display nameOsmotic fragility beginning hemolysis (RBC)

DescriptionOsmotic fragility.beginning hemolysis

Short nameOF start NFr RBC

ComponentOsmotic fragility.beginning hemolysis

PropertyNFr

TimingPt

System (specimen)RBC

ScaleQn

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.70

Consumer names

Osmotic fragility beginning hemolysis, Red blood cells

Part names

Osmotic fragility.beginning hemolysisNFrPtRBCQnOsmotic fragility beginning hemolysisNumber FractionPoint 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.