LOINCActiveBoth

LOINC Code 43166-8: Carbon.organic (Specimen) [Mass/Vol]

43166-8 is a LOINC code used to identify Carbon.organic (Specimen) [Mass/Vol] 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 Carbon.organic. 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 Carbon.organic. 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: Both

What it does not mean

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

Key facts

  • Carbon.organic [Mass/volume] in Specimen
  • Carbon.organic
  • Carbon organic; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; 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

Carbon.organic (Specimen) [Mass/Vol]Carbon.organic [Mass/volume] in SpecimenCarbon organic Spec-mCncCarbon.organicDRUG/TOXCarbon.organic, SpecimenMCnc

Frequently asked questions

Code details

Code43166-8
SystemLOINC
Display nameCarbon.organic (Specimen) [Mass/Vol]
DescriptionCarbon.organic
Short nameCarbon organic Spec-mCnc
ComponentCarbon.organic
PropertyMCnc
TimingPt
System (specimen)XXX
ScaleQn
ClassDRUG/TOX
Example unitsmg/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.69

Consumer names

Carbon.organic, Specimen

Part names

Carbon.organicMCncPtXXXQnMass ConcentrationPoint 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 43166-8 | HealthAssure