|Last Updated: November 21, 2019 @ 10:13 am|
|Stability:||Ambient: 1 Day(s); Refrigerated: 4 Day(s); Frozen: 12 Month(s); Incubated: Unacceptable|
Cortisol reference range varies depending on time of draw, see reference ranges below.
Cortisol Reference Range:
Cortisol (AM) = 6.02-18.4 ug/dL
Cortisol (PM) = 2.68-10.5 ug/dL
Biotin in specimens taken from patients on high-dose biotin therapy or supplements may intefere with this test and cause inaccurate test results. It is recommended that for patients receiving therapy with high biotin doses (> 5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.