LOINCActiveObservation

LOINC Code 3171-6: Specimen dry weight (72 hour Stl) [Mass/Time]

3171-6 is a LOINC code used to identify Specimen dry weight (72 hour Stl) [Mass/Time] 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 Specimen.dry weight. It is commonly used with the system or sample type Stool.

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 Specimen.dry weight. It is commonly used with the system or sample type Stool.

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

  • Dry weight [Mass/time] of 72 hour Stool
  • Specimen.dry weight
  • 3 days; 72 hours; 72HR; Bowel movement; Dry Spec Wt; Faecal; Faeces; Fecal; Feces; Mass rate; mRate; QNT; Quan; Quant; Quantitative; Spec; Stl; Stool = Fecal; 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

Specimen dry weight (72 hour Stl) [Mass/Time]Dry weight [Mass/time] of 72 hour StoolDry Spec Wt 72h Stl-mRateSpecimen.dry weightSPECSpecimen dry weight, StoolMRat

Frequently asked questions

Code details

Code3171-6
SystemLOINC
Display nameSpecimen dry weight (72 hour Stl) [Mass/Time]
DescriptionSpecimen.dry weight
Short nameDry Spec Wt 72h Stl-mRate
ComponentSpecimen.dry weight
PropertyMRat
Timing72H
System (specimen)Stool
ScaleQn
ClassSPEC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Consumer names

Specimen dry weight, Stool

Part names

Specimen.dry weightMRat72HStoolQnSpecimen dry weightMass Rate72 hours

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.