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Cortisol Baseline

Ordering Info & Methodology

Test Code

Cerner Synonyms


Cortisol ACTH Stimulation Test, Cosyntropin test, Cortisol Baseline, Cortrosyn Stimulation Test, Cosyntropin Stimulation Test

Turn Around Time


Analyzed within 1 day of receipt.

Sandwich immunoassay, electrochemiluminescence, Roche Cobas Cortisol II

Ordering Guide

CORF, COR30 and COR60

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers




0.5 mL

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Refrigerate. Send on ice pack.

Reference Intervals

Female Reference Interval

Age Category
Reference Interval

Male Reference Interval

Age Category
Reference Interval
Additional Notes

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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.


Measurement Uncertainty

Interpretation provided by laboratory professional staff. New cortisol II immunoassay is more specific than previous immunoassays. Therefore cut offs for adequate adrenal response may vary from literature sources. Please call the laboratory if there are questions regarding interpretation.

Exogenous estrogens (e.g. oral contraceptives) can cause a falsely reassuring response, and should be discontinued prior to testing.

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