LOINC

LOINC Code 3155-9: Specimen mass (Specimen) [Mass]

3155-9 is a LOINC code used to identify Specimen mass (Specimen) [Mass] 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 mass. 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 mass. 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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Weight of Unspecified specimen
  • Specimen mass
  • Misc; Miscellaneous; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; To be specified in another part of the message; Unspecified

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 mass (Specimen) [Mass]Deprecated Weight of Unspecified specimenDeprecated Specimen mass QnSpecimen massSPECSpecimen Mass, SpecimenMass

Frequently asked questions

Code details

Code3155-9
SystemLOINC
Display nameSpecimen mass (Specimen) [Mass]
DescriptionSpecimen mass
Short nameDeprecated Specimen mass Qn
ComponentSpecimen mass
PropertyMass
TimingPt
System (specimen)XXX
ScaleQn
ClassSPEC
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.69

Consumer names

Specimen Mass, Specimen

Part names

Specimen massMassPtXXXQnPoint 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 3155-9 | HealthAssure