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 47845-3: Cortisol post 1 mg dexamethasone PO overnight [Moles/Vol]

Name: LOINC Code 47845-3: Cortisol post 1 mg dexamethasone PO overnight [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:32.262Z

47845-3 is a LOINC code used to identify Cortisol post 1 mg dexamethasone PO overnight [Moles/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^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^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: Both

What it does not mean

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

Key facts

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

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 post 1 mg dexamethasone PO overnight [Moles/Vol]Cortisol [Moles/volume] in Serum or Plasma --post 1 mg dexamethasone PO overnightCortis p 1 mg Dex SerPl-sCncCortisol^post 1 mg dexamethasone PO overnightCHAL.ROUTINECortisol after 1 mg Dexamethasone By Mouth Overnight, BloodSCnc

Frequently asked questions

Code details

Code47845-3

SystemLOINC

Display nameCortisol post 1 mg dexamethasone PO overnight [Moles/Vol]

DescriptionCortisol^post 1 mg dexamethasone PO overnight

Short nameCortis p 1 mg Dex SerPl-sCnc

ComponentCortisol^post 1 mg dexamethasone PO overnight

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL.ROUTINE

Example unitsnmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.70

Consumer names

Cortisol after 1 mg Dexamethasone By Mouth Overnight, Blood

Part names

Cortisol^post 1 mg dexamethasone PO overnightSCncPtSer/PlasQnSubstance 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.