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 59804-5: Cortisol 1 Hr post Unsp challenge [Molar conc diff]

Name: LOINC Code 59804-5: Cortisol 1 Hr post Unsp challenge [Molar conc diff]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.744Z

59804-5 is a LOINC code used to identify Cortisol 1 Hr post Unsp challenge [Molar conc diff] 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^1H post XXX challenge. 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^1H post XXX challenge. 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 [Molar concentration difference] in Serum or Plasma --1 hour post XXX challenge
Cortisol^1H post XXX challenge
This code represents the change in the cortisol level post challange compared to the zero time (baseline) specimen. It is a calculation and is reported along with the actual cortisol level at the time indicated in the Component Name.
1 hour; 1.0Hr; 17-Hydroxycorticosterone; 1h p chal; 60 min; 60 minutes; 60M; 60min; After; CHEMISTRY.CHALLENGE TESTING; Compound F; Coritsol; Cort; F; hydrocortisone; p chal; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SCDiff; 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 1 Hr post Unsp challenge [Molar conc diff]Cortisol [Molar concentration difference] in Serum or Plasma --1 hour post XXX challengeCortis 1h p chal SerPl-SCDiffCortisol^1H post XXX challengeCHALCortisol 1 hr after challenge, BloodSCncDiff

Frequently asked questions

Code details

Code59804-5

SystemLOINC

Display nameCortisol 1 Hr post Unsp challenge [Molar conc diff]

DescriptionCortisol^1H post XXX challenge

Short nameCortis 1h p chal SerPl-SCDiff

ComponentCortisol^1H post XXX challenge

PropertySCncDiff

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsnmol/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.32

Last changed2.70

Consumer names

Cortisol 1 hr after challenge, Blood

Part names

Cortisol^1H post XXX challengeSCncDiffPtSer/PlasQnSubstance concentration differencePoint 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.