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.

LOINCActiveObservation

LOINC Code 94012-2: Urea nitrogen 2 Hr post dose vasopressin [Mass/Vol]

Name: LOINC Code 94012-2: Urea nitrogen 2 Hr post dose vasopressin [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:23.054Z

94012-2 is a LOINC code used to identify Urea nitrogen 2 Hr post dose vasopressin [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^2H post dose vasopressin. It is commonly used with the system or sample type Ser/Plas.

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^2H post dose vasopressin. 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: Observation

What it does not mean

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

Key facts

Urea nitrogen [Mass/volume] in Serum or Plasma --2 hours post dose vasopressin
Urea nitrogen^2H post dose vasopressin
120 min; 120 minutes; 120min; 2 hours; 2h p Vaso; ADH; Adiuretin; After; Antidiuretic hormone; Arginine vasopressin hormone; AVH; Blood urea nitrogen; BUN; CHEMISTRY.CHALLENGE TESTING; Level; Mass concentration; N; N2; Nit; p dose; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UN; VP

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 2 Hr post dose vasopressin [Mass/Vol]Urea nitrogen [Mass/volume] in Serum or Plasma --2 hours post dose vasopressinBUN 2h p Vaso SerPl-mCncUrea nitrogen^2H post dose vasopressinCHALUrea Nitrogen (BUN) 2 hr after vasopressin, BloodMCnc

Frequently asked questions

Code details

Code94012-2

SystemLOINC

Display nameUrea nitrogen 2 Hr post dose vasopressin [Mass/Vol]

DescriptionUrea nitrogen^2H post dose vasopressin

Short nameBUN 2h p Vaso SerPl-mCnc

ComponentUrea nitrogen^2H post dose vasopressin

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmg/dL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.67

Last changed2.67

Consumer names

Urea Nitrogen (BUN) 2 hr after vasopressin, Blood

Part names

Urea nitrogen^2H post dose vasopressinMCncPtSer/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.