Days Set Up
Monday, Wednesday, Friday
Analytic Time

3 - 5 days

MiChart Code
Cortisol, Salivary (Sendout)
Soft Order Code

Test Updated:


Salivary Cortisol
Cortisol, Saliva
COLT3 - SALCT: Collection Time in Milatary

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Screening for Cushing syndrome.

Reference Range

11 pm - 12 midnight: <100 ng/mL; 7 am - 9 am: 100 - 750 ng/mL; 3 pm - 5 pm: <401 ng/mL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

1) Do not brush teeth before collecting specimen. 2) Do not eat or drink for 15 minutes prior to specimen collection. 3) Collect specimen between 11 pm and 12 midnight (preferred), 7 am and 9 am, or 3 pm and 5 pm. 4) Place swab directly into mouth by tipping salivette container so that swab falls into mouth; do not touch swab with fingers. 5) Keep swab in mouth for 2 minutes. Roll swab in mouth; do not chew swab. 6) Place swab back into container and replace cap. Refrigerate.

Normal Volume
1.5 mL saliva
Minimum Volume
0.6 mL saliva

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.