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 58659-4: Cortisol 2 Hr post 1 ug/kg CRH IV [Moles/Vol]

Name: LOINC Code 58659-4: Cortisol 2 Hr post 1 ug/kg CRH IV [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.275Z

58659-4 is a LOINC code used to identify Cortisol 2 Hr post 1 ug/kg CRH IV [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^2H post 1 ug/kg CRH IV. 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^2H post 1 ug/kg CRH IV. 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 [Moles/volume] in Serum or Plasma --2 hours post 1 ug/kg CRH IV
Cortisol^2H post 1 ug/kg CRH IV
120 min; 120 minutes; 120min; 17-Hydroxycorticosterone; 2 hours; 2h p 1 ug/kg CRH IV; After; CHEMISTRY.CHALLENGE TESTING; Compound F; Coritsol; Cort; F; hydrocortisone; i; Level; mcg; 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 2 Hr post 1 ug/kg CRH IV [Moles/Vol]Cortisol [Moles/volume] in Serum or Plasma --2 hours post 1 ug/kg CRH IVCortis 2h p 1 ug/kg CRH IV SerPl-sCncCortisol^2H post 1 ug/kg CRH IVCHALCortisol 2 hr after 1 ug/kg CRH intravenous, BloodSCnc

Frequently asked questions

Code details

Code58659-4

SystemLOINC

Display nameCortisol 2 Hr post 1 ug/kg CRH IV [Moles/Vol]

DescriptionCortisol^2H post 1 ug/kg CRH IV

Short nameCortis 2h p 1 ug/kg CRH IV SerPl-sCnc

ComponentCortisol^2H post 1 ug/kg CRH IV

PropertySCnc

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 2 hr after 1 ug/kg CRH intravenous, Blood

Part names

Cortisol^2H post 1 ug/kg CRH IVSCncPtSer/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.