LOINCActiveObservation

LOINC Code 43156-9: Reagent Lot number

43156-9 is a LOINC code used to identify Reagent Lot number 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 Lot number. It is commonly used with the system or sample type Reagent.

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 Lot number. It is commonly used with the system or sample type Reagent.

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

  • Reagent Lot number
  • Lot number
  • Ident; Identifier; Lot #; No; Nominal; Num; Point in time; Random

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

Reagent Lot numberReagent Lot #Lot numberDEVICESIDPtReagent

Frequently asked questions

Code details

Code43156-9
SystemLOINC
Display nameReagent Lot number
DescriptionLot number
Short nameReagent Lot #
ComponentLot number
PropertyID
TimingPt
System (specimen)Reagent
ScaleNom
ClassDEVICES
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.73

Part names

Lot numberIDPtReagentNomIdentifierPoint 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 43156-9 | HealthAssure