What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 12991-6: Polychlorinated biphenyl.Aroclor 1254 [Mass/Vol]

Name: LOINC Code 12991-6: Polychlorinated biphenyl.Aroclor 1254 [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

12991-6 is a LOINC code used to identify Polychlorinated biphenyl.Aroclor 1254 [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 Polychlorinated biphenyl.Aroclor 1254. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Polychlorinated biphenyl.Aroclor 1254. It is commonly used with the system or sample type Ser/Plas.

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

Polychlorinated biphenyl.Aroclor 1254 [Mass/volume] in Serum or Plasma
Polychlorinated biphenyl.Aroclor 1254
1,1'-Biphenyl; Bibenzene; Biphenyls; Diphenyl; DRUG/TOXICOLOGY; Drugs; Lemonene; Level; Mass concentration; PCB; PCB Aroclor1254; PCBs; Phenylbenzene; Pl; Plasma; Plsm; Point in time; Polychlorinated biphenyls; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Tetrosin LY

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Polychlorinated biphenyl.Aroclor 1254 [Mass/Vol] (12991-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Polychlorinated biphenyl.Aroclor 1254 [Mass/Vol]Polychlorinated biphenyl.Aroclor 1254 [Mass/volume] in Serum or PlasmaPCB Aroclor1254 SerPl-mCncPolychlorinated biphenyl.Aroclor 1254DRUG/TOXPolychlorinated Biphenyl.Aroclor 1254, BloodMCnc

Frequently asked questions

Code details

Code12991-6

SystemLOINC

Display namePolychlorinated biphenyl.Aroclor 1254 [Mass/Vol]

DescriptionPolychlorinated biphenyl.Aroclor 1254

Short namePCB Aroclor1254 SerPl-mCnc

ComponentPolychlorinated biphenyl.Aroclor 1254

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassDRUG/TOX

Example unitsug/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.73

Consumer names

Polychlorinated Biphenyl.Aroclor 1254, Blood

Part names

Polychlorinated biphenyl.Aroclor 1254MCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.