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 74006-8: Weight difference [Mass difference] --pre dialysis - post dialysis

Name: LOINC Code 74006-8: Weight difference [Mass difference] --pre dialysis - post dialysis
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:53.973Z

74006-8 is a LOINC code used to identify Weight difference [Mass difference] --pre dialysis - post dialysis 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 Weight difference^pre dialysis-post dialysis. It is commonly used with the system or sample type ^Patient.

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 Weight difference^pre dialysis-post dialysis. It is commonly used with the system or sample type ^Patient.

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
Method: Calculated

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Weight difference [Mass difference] --pre dialysis - post dialysis

Weight difference^pre dialysis-post dialysis

Body weight difference (amount lost) post dialysis is determined by the difference between pre-dialysis [LOINC8347-7] and post-dialysis [LOINC: 8344-4] measurements.

After; Before; BODY WEIGHT.MOLEC; Calc; Calculation; Dialy; p dialysis; Point in time; pre-post dialysis; PST; QNT; Quan; Quant; Quantitative; Random; Wt

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

Weight difference [Mass difference] --pre dialysis - post dialysisWeight diff pre-post dialysis MDiff CalcWeight difference^pre dialysis-post dialysisBDYWGT.MOLECMDiffPt^Patient

Frequently asked questions

Code details

Code74006-8

SystemLOINC

Display nameWeight difference [Mass difference] --pre dialysis - post dialysis

DescriptionWeight difference^pre dialysis-post dialysis

Short nameWeight diff pre-post dialysis MDiff Calc

ComponentWeight difference^pre dialysis-post dialysis

PropertyMDiff

TimingPt

System (specimen)^Patient

ScaleQn

MethodCalculated

ClassBDYWGT.MOLEC

Example unitskg;lb

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.46

Last changed2.48

Part names

Weight difference^pre dialysis-post dialysisMDiffPt^PatientQnCalculatedMass differencePoint in time (spot)

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.