57824-5

LOINC Code


LOINC code57824-5
name
descriptionIdentifies a morning specimen when free cortisol is at its highest point in a circadian cycle - often considered to be 8AM. Some laboratories will call this "8AM" specimen, but specimens in the range of 7AM to 9AM are acceptable. The peak time may have to be adjusted for patients on night or evening shifts because their circadian rhythms can shift with their sleeping time.
statusACTIVE

Fully-Specified Name

componentCortisol.free^AM peak specimen
propertyMCnc  =  Mass Concentration
timePt  =  Point in time:  To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements.
systemSer/Plas
    Ser  =  Serum
    Plas  =  Plasma
scaleQn  =  Quantitative:  The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256
method

Additional Names

short name17-Hydroxycorticosterone; 8 AM; 8AM; AM diurnal peak; Chemistry; circadian high; Compound F; Coritsol; Cort; Cortis F; F; FR; hydrocortisone; Level; Mass concentration; Morning; Non-protein bound; Pl; Plasma; Plsm; Point in time; Post; Postdose; Post-dose

Basic Attributes

classCHEM
type1  Laboratory
order vs. observationCortis F AM pea
example UCUM unitsug/dL
The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org)

History/Usage

first released
last updated2.73
last change typeMIN  - change to field other than name
change reasonug/dL

Related Names

N

Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.

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