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Cortisol, A.M.
Cortisol, A.M.
Our Price: $122.00


Cortisol, A.M.

Test Code


CPT Code(s)


Clinical Significance

Cortisol is increased in Cushing's Disease and decreased in Addison's Disease (adrenal insufficiency).

Patient Preparation

Assay is not recommended when patient is receiving prednisone/prednisolone therapy due to cross reactivity with the antibody used in this assay

Preferred Specimen(s)

1 mL serum

Minimum Volume

0.5 mL

Collection Instructions

Collect specimen between 7-9 a.m. Indicate the collection time on the specimen container and test requisition.

Transport Container

Serum Separator Tube (SST®)

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days


Immunoassay (IA)

Performing Laboratory

Quest Diagnostics - West Region

Setup Schedule

Set up: Tues-Sat (Day shift, cutoff 9 a.m.); Report available: 3 days

Reference Range(s)

0-3 Days (infants)
Premature (31-35 Weeks)≤15.0µg/dL
4 Days-1 MonthNot established
2-11 Months 8 a.m. (7-9 a.m.) specimen3.0-23.0µg/dL
1-17 Years 8 a.m. (7-9 a.m.) specimen3.0-25.0µg/dL
>17 Years 8 a.m. (7-9 a.m.) specimen4.0-22.0 µg/dL

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