Collection Notes: Collect the morning specimen between 7 - 9 AM. Collect the afternoon specimen between 3 – 5 PM. Record time of collection on specimen container and requisition.
Clinical Utility: Cortisol levels are increased in Cushing’s disease. Levels are decreased in Addison’s disease, and levels are affected in clinical depression.
Serum (0.5 mL)
Refrigerated 5 Days
Frozen 3 Months
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