LOINCActive

LOINC Code 26437-4: Chemistry challenge studies (set)

26437-4 is a LOINC code used to identify Chemistry challenge studies (set) 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 Chemistry challenge studies. It is commonly used with the system or sample type ^Patient.

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 Chemistry challenge studies. It is commonly used with the system or sample type ^Patient.

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

What it does not mean

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

Key facts

  • Chemistry challenge studies (set)
  • Chemistry challenge studies
  • ATTACH; ATTACH.LAB; Complex; Lab

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

Chemistry challenge studies (set)Chemistry challenge studiesATTACH.LABCmplx-^PatientSet

Frequently asked questions

Code details

Code26437-4
SystemLOINC
Display nameChemistry challenge studies (set)
DescriptionChemistry challenge studies
ComponentChemistry challenge studies
PropertyCmplx
Timing-
System (specimen)^Patient
ScaleSet
ClassATTACH.LAB
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.27

Part names

Chemistry challenge studiesCmplx-^PatientSetComplex

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 26437-4 | HealthAssure