LOINCActiveObservation

LOINC Code 1434-0: Cortisol 8 Hr post 1 mg dexamethasone PO overnight [Mass/Vol]

1434-0 is a LOINC code used to identify Cortisol 8 Hr post 1 mg dexamethasone PO overnight [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 Cortisol^8H post 1 mg dexamethasone PO overnight. 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 Cortisol^8H post 1 mg dexamethasone PO overnight. 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

  • Cortisol [Mass/volume] in Serum or Plasma --8 hours post 1 mg dexamethasone PO overnight
  • Cortisol^8H post 1 mg dexamethasone PO overnight
  • 17-Hydroxycorticosterone; 8h p 1 mg Dex; After; c350; CHEMISTRY.CHALLENGE TESTING; Compound F; Coritsol; Cort; Decadron; Dexameth; Dexone; F; Hexadrol; hydrocortisone; i; Level; Mass concentration; p 1 mg Dex; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Cortisol 8 Hr post 1 mg dexamethasone PO overnight [Mass/Vol]Cortisol [Mass/volume] in Serum or Plasma --8 hours post 1 mg dexamethasone PO overnightCortis 8h p 1 mg Dex SerPl-mCncCortisol^8H post 1 mg dexamethasone PO overnightCHALCortisol 8 hr after 1 mg Dexamethasone By Mouth Overnight, BloodMCnc

Frequently asked questions

Code details

Code1434-0
SystemLOINC
Display nameCortisol 8 Hr post 1 mg dexamethasone PO overnight [Mass/Vol]
DescriptionCortisol^8H post 1 mg dexamethasone PO overnight
Short nameCortis 8h p 1 mg Dex SerPl-mCnc
ComponentCortisol^8H post 1 mg dexamethasone PO overnight
PropertyMCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHAL
Example unitspg/mL;ug/dL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Consumer names

Cortisol 8 hr after 1 mg Dexamethasone By Mouth Overnight, Blood

Part names

Cortisol^8H post 1 mg dexamethasone PO overnightMCncPtSer/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.