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 50418-3: Corticotropin post 2 mg dexamethasone PO overnight (P) [Mass/Vol]

Name: LOINC Code 50418-3: Corticotropin post 2 mg dexamethasone PO overnight (P) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.496Z

50418-3 is a LOINC code used to identify Corticotropin post 2 mg dexamethasone PO overnight (P) [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 Corticotropin^post 2 mg dexamethasone PO overnight. It is commonly used with the system or sample type 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 Corticotropin^post 2 mg dexamethasone PO overnight. It is commonly used with the system or sample type 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

Corticotropin [Mass/volume] in Plasma --post 2 mg dexamethasone PO overnight
Corticotropin^post 2 mg dexamethasone PO overnight
ACTH; Adrenocorticotrophic hormone; Adrenocorticotropin; After; c206; c350; c74; CHEMISTRY.CHALLENGE TESTING; Cortrosyn; Decadron; Dexameth; Dexone; Hexadrol; II; Level; Mass concentration; p 2 mg Dex; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; Rc206; Tumor marker

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

Corticotropin post 2 mg dexamethasone PO overnight (P) [Mass/Vol]Corticotropin [Mass/volume] in Plasma --post 2 mg dexamethasone PO overnightACTH p 2 mg Dex Plas-mCncCorticotropin^post 2 mg dexamethasone PO overnightCHALCorticotropin after 2 mg Dexamethasone By Mouth Overnight, BloodMCnc

Frequently asked questions

Code details

Code50418-3

SystemLOINC

Display nameCorticotropin post 2 mg dexamethasone PO overnight (P) [Mass/Vol]

DescriptionCorticotropin^post 2 mg dexamethasone PO overnight

Short nameACTH p 2 mg Dex Plas-mCnc

ComponentCorticotropin^post 2 mg dexamethasone PO overnight

PropertyMCnc

TimingPt

System (specimen)Plas

ScaleQn

ClassCHAL

Example unitspg/mL;ng/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.40

Consumer names

Corticotropin after 2 mg Dexamethasone By Mouth Overnight, Blood

Part names

Corticotropin^post 2 mg dexamethasone PO overnightMCncPtPlasQnMass ConcentrationPoint in time (spot)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.