LOINCActiveObservation

LOINC Code 3154-2: Specimen weight (Specimen)

3154-2 is a LOINC code used to identify Specimen weight (Specimen) 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 weight. It is commonly used with the system or sample type XXX.

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 weight. It is commonly used with the system or sample type XXX.

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

  • Weight of Specimen
  • Specimen weight
  • Misc; Miscellaneous; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; Specimen wt; To be specified in another part of the message; Unspecified; 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 weight (Specimen)Weight of SpecimenSpecimen wtSpecimen weightSPECSpecimen weight, SpecimenMass

Frequently asked questions

Code details

Code3154-2
SystemLOINC
Display nameSpecimen weight (Specimen)
DescriptionSpecimen weight
Short nameSpecimen wt
ComponentSpecimen weight
PropertyMass
TimingPt
System (specimen)XXX
ScaleQn
ClassSPEC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Specimen weight, Specimen

Part names

Specimen weightMassPtXXXQnPoint 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.

LOINC Code 3154-2 | HealthAssure