Specimen:
Collect
- One SST
Also Acceptable:
- One Green Top (Li Heparin)
- One Lavender (EDTA)
- One Pink Top (EDTA)
- One Red Top
Submit
- 1 mL (Min:0.5 mL) Serum in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
Also Acceptable:
- 1 mL (Min:0.5 mL) Serum in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
- 1 mL (Min:0.5 mL) Plasma in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
- 1 mL (Min:0.5 mL) Plasma in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
- 1 mL (Min:0.5 mL) Plasma in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling
- Avoid Repeated Freeze/Thaw Cycles
- 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.
- Collection time: 6:00-10:00am.
Reference Range: 6.02-18.40 ug/dL
Collection time: 4:00-8:00pm.
Reference Range: 2.68-10.50 ug/dL
Stability
Ambient: 1 Day(s); Refrigerated: 4 Day(s); Frozen: 1 Year(s); Incubated: Unacceptable
Methodology
- Electrochemiluminescence Immunoassay (ECLIA)
Performed
Mon-Fri
Reported
1-3 Day(s)
CPT Codes
- 82533
Interpretive Data
Cortisol reference range varies depending on time of draw, see reference ranges below.
Reference Ranges:
Collection time 6:00-10:00am: 6.02-18.40 ug/dL.
Collection time 4:00-8:00pm: 2.68-10.50 ug/dL.
Biotin in specimens taken from patients on high-dose biotin therapy or supplements may interfere 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.
Components
- 2880 - CORTISOL
Last Updated: February 13, 2026 @ 10:13 am
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