LOINCActiveObservation

LOINC Code 12974-2: Urea nitrogen spec 3 (Perit dial fld) [Mass/Vol]

12974-2 is a LOINC code used to identify Urea nitrogen spec 3 (Perit dial fld) [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 Urea nitrogen^3rd specimen. It is commonly used with the system or sample type Dial fld prt.

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 Urea nitrogen^3rd specimen. It is commonly used with the system or sample type Dial fld prt.

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

  • Urea nitrogen [Mass/volume] in Peritoneal dialysis fluid --3rd specimen
  • Urea nitrogen^3rd specimen
  • Blood urea nitrogen; Chemistry; Diaf; DiafP; Dialysate; Dialysis fluid; Level; Mass concentration; N; N2; Nit; Peritoneal Dialysis fluid; Point in time; QNT; Quan; Quant; Quantitative; Random; sp3; Spec; UN

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

Urea nitrogen spec 3 (Perit dial fld) [Mass/Vol]Urea nitrogen [Mass/volume] in Peritoneal dialysis fluid --3rd specimenUrea nit sp3 DiafP-mCncUrea nitrogen^3rd specimenCHEMUrea Nitrogen (BUN) specimen 3, Peritoneal dialysis fluidMCnc

Frequently asked questions

Code details

Code12974-2
SystemLOINC
Display nameUrea nitrogen spec 3 (Perit dial fld) [Mass/Vol]
DescriptionUrea nitrogen^3rd specimen
Short nameUrea nit sp3 DiafP-mCnc
ComponentUrea nitrogen^3rd specimen
PropertyMCnc
TimingPt
System (specimen)Dial fld prt
ScaleQn
ClassCHEM
Example unitsmg/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.42

Consumer names

Urea Nitrogen (BUN) specimen 3, Peritoneal dialysis fluid

Part names

Urea nitrogen^3rd specimenMCncPtDial fld prtQnMass ConcentrationPoint in time (spot)Dialysis fluid peritoneal

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 12974-2 | HealthAssure