LOINCActiveObservation

LOINC Code 34964-7: Osmotic fragility (RBC) [Interp]

34964-7 is a LOINC code used to identify Osmotic fragility (RBC) [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 Osmotic fragility. 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. 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 [Interpretation] of Red Blood Cells
  • Osmotic fragility
  • Erythrocytes; Frag; Fragil; HEMATOLOGY/CELL COUNTS; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; OF; Osmo; Osmo Frag; Point in time; 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 (RBC) [Interp]Osmotic fragility [Interpretation] of Red Blood CellsOF RBC-ImpOsmotic fragilityHEM/BCOsmotic fragility, Red blood cellsImp

Frequently asked questions

Code details

Code34964-7
SystemLOINC
Display nameOsmotic fragility (RBC) [Interp]
DescriptionOsmotic fragility
Short nameOF RBC-Imp
ComponentOsmotic fragility
PropertyImp
TimingPt
System (specimen)RBC
ScaleNom
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.11
Last changed2.73

Consumer names

Osmotic fragility, Red blood cells

Part names

Osmotic fragilityImpPtRBCNomImpression/interpretation of studyPoint 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 34964-7 | HealthAssure