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 50420-9: Corticotropin post 500 ug dexamethasone PO 2.5 day low dose q6h (P) [Mass/Vol]

Name: LOINC Code 50420-9: Corticotropin post 500 ug dexamethasone PO 2.5 day low dose q6h (P) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.496Z

50420-9 is a LOINC code used to identify Corticotropin post 500 ug dexamethasone PO 2.5 day low dose q6h (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 500 ug dexamethasone PO 2.5 day low dose q6h. 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 500 ug dexamethasone PO 2.5 day low dose q6h. 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 500 ug dexamethasone PO 2.5 day low dose q6h
Corticotropin^post 500 ug dexamethasone PO 2.5 day low dose q6h
ACTH; Adrenocorticotrophic hormone; Adrenocorticotropin; After; c206; c350; c74; CHEMISTRY.CHALLENGE TESTING; Cortrosyn; Decadron; Dexameth; Dexone; Hexadrol; Level; lo dose; Mass Concentration; mcg; p 500 ug 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 500 ug dexamethasone PO 2.5 day low dose q6h (P) [Mass/Vol]Corticotropin [Mass/volume] in Plasma --post 500 ug dexamethasone PO 2.5 day low dose q6hACTH p 500 ug Dex Plas-mCncCorticotropin^post 500 ug dexamethasone PO 2.5 day low dose q6hCHALCorticotropin after 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, BloodMCnc

Frequently asked questions

Code details

Code50420-9

SystemLOINC

Display nameCorticotropin post 500 ug dexamethasone PO 2.5 day low dose q6h (P) [Mass/Vol]

DescriptionCorticotropin^post 500 ug dexamethasone PO 2.5 day low dose q6h

Short nameACTH p 500 ug Dex Plas-mCnc

ComponentCorticotropin^post 500 ug dexamethasone PO 2.5 day low dose q6h

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 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, Blood

Part names

Corticotropin^post 500 ug dexamethasone PO 2.5 day low dose q6hMCncPtPlasQnMass 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.