LOINCActiveObservation

LOINC Code 45375-3: Time of analysis (Specimen)

45375-3 is a LOINC code used to identify Time of analysis (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 Time of analysis. 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 Time of analysis. 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

  • Time of analysis of unspecified specimen
  • Time of analysis
  • Date and time; Misc; Miscellaneous; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; Time stamp; Timestamp; 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

Time of analysis (Specimen)Time of analysis of unspecified specimenTime Of Analysis SpecTime of analysisMISCTime of analysis, SpecimenTmStp

Frequently asked questions

Code details

Code45375-3
SystemLOINC
Display nameTime of analysis (Specimen)
DescriptionTime of analysis
Short nameTime Of Analysis Spec
ComponentTime of analysis
PropertyTmStp
TimingPt
System (specimen)XXX
ScaleQn
ClassMISC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.73

Consumer names

Time of analysis, Specimen

Part names

Time of analysisTmStpPtXXXQnTime Stamp (Date and Time)Point 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 45375-3 | HealthAssure