LOINCActiveOrder

LOINC Code 94128-6: Vasopressin challenge post water deprivation panel (U+S/P)

94128-6 is a LOINC code used to identify Vasopressin challenge post water deprivation panel (U+S/P) 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 Vasopressin challenge post water deprivation panel. It is commonly used with the system or sample type Urine+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 Vasopressin challenge post water deprivation panel. It is commonly used with the system or sample type Urine+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: Order
  • Panel type: Panel

What it does not mean

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

Key facts

  • Vasopressin challenge post water deprivation panel - Urine and Serum or Plasma
  • Vasopressin challenge post water deprivation panel
  • This panel is used to report results of a vasopressin challenge, if done as part of the water deprivation test. Different protocols may call for various measurement of urine osmolality +/- serum/plasma osmolality and electrolytes at various intervals post vasopressin dose. The rise in urine osmolality after vasopressin can help differentiate between central and nephrogenic diabetes insipidus.
  • ADH; Adiuretin; After; Antidiuretic hormone; Arginine vasopressin hormone; AVH; CHEMISTRY.CHALLENGE TESTING; Pan; PANEL.CHALLENGE; Panl; Pl; Plasma; Plsm; Pnl; Point in time; PST; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UR; Ur+SerPl; Urn; Vasopressin chal p H2O deprivation Pnl; 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

Vasopressin challenge post water deprivation panel (U+S/P)Vasopressin challenge post water deprivation panel - Urine and Serum or PlasmaVasopressin chal p H2O depr Pnl U+SerPlVasopressin challenge post water deprivation panelPANEL.CHALVasopressin challenge after water deprivation panel, Urine+Blood-

Frequently asked questions

Code details

Code94128-6
SystemLOINC
Display nameVasopressin challenge post water deprivation panel (U+S/P)
DescriptionVasopressin challenge post water deprivation panel
Short nameVasopressin chal p H2O depr Pnl U+SerPl
ComponentVasopressin challenge post water deprivation panel
Property-
TimingPt
System (specimen)Urine+Ser/Plas
Scale-
ClassPANEL.CHAL
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.67
Last changed2.67

Consumer names

Vasopressin challenge after water deprivation panel, Urine+Blood

Part names

Vasopressin challenge post water deprivation panel-PtUrine+Ser/PlasPoint in time (spot)Urine and 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.

LOINC Code 94128-6 | HealthAssure