Cortisol, 4PM reference ranges are applicable to specimens collected between 3 and 5 pm. For specimens collected outside this time period, please order a Cortisol, Random (CORT)
Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
* This volume does not allow for repeat testing
Must be collected between 3 and 5 pm
Centrifuge and separate from cells within 48 hours from collection
Do not use frost free units that undergo repeated freeze/thaw cycles
2.4 - 12.8 ug/dL
Patients taking vitamin supplements containing high doses of biotin (>5 mg/day) may have falsely increased test results generated.
Same Day/1 to 2 days
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